diff --git a/src/pages/list/sort/service.ts b/src/pages/list/sort/service.ts
index 4286ccb..4c2beb6 100644
--- a/src/pages/list/sort/service.ts
+++ b/src/pages/list/sort/service.ts
@@ -1,11 +1,18 @@
+import { isNumber } from "utils/string";
+export type SortingMethod = 'numeric' | 'alphabetic' | 'length';
+export type SplitOperatorType = 'symbol' | 'regex';
+
 // utils function that choose the way of numeric sorting mixed types of array
-function customNumericSort(a: number | string, b: number | string, increasing: boolean): number {
-    if (typeof a === 'number' && typeof b === 'number') {
-        let result: number = increasing ? (a - b) : (b - a);
+function customNumericSort(a: string, b: string, increasing: boolean): number {
+   
+    const formattedA = isNumber(a) ? Number(a) : a;
+    const formattedB = isNumber(b) ? Number(b) : b;
+    if (typeof formattedA === 'number' && typeof formattedB === 'number') {
+        let result: number = increasing ? (formattedA - formattedB) : (formattedB - formattedA);
         return result;
-    } else if (typeof a === 'string' && typeof b === 'string') {
-        return a.localeCompare(b); // Lexicographical comparison for strings
-    } else if (typeof a === 'number' && typeof b === 'string') {
+    } else if (typeof formattedA === 'string' && typeof formattedB === 'string') {
+        return formattedA.localeCompare(formattedB); // Lexicographical comparison for strings
+    } else if (typeof formattedA === 'number' && typeof formattedB === 'string') {
         return -1; // Numbers before strings
     } else {
         return 1; // Strings after numbers
@@ -13,55 +20,52 @@ function customNumericSort(a: number | string, b: number | string, increasing: b
 }
 
 export function numericSort(
-    array: any[], // array we build after parsing the input
+    array: string[], // array we build after parsing the input
     increasing: boolean,
-    separator: string,
+    joinSeparator: string,
     removeDuplicated: boolean // the value if the checkbox has been selected 1 else 0
 ) {
     array.sort((a, b) => customNumericSort(a, b, increasing));
     if (removeDuplicated) {
         array = array.filter((item, index) => array.indexOf(item) === index);
     }
-    return array.join(separator);
+    return array.join(joinSeparator);
 }
 
 // utils function that choose the way of numeric sorting mixed types of array
-function customLengthSort(a: number | string, b: number | string, increasing: boolean): number {
-    let result: number = increasing ? (a.toString().length - b.toString().length) : (b.toString().length - a.toString().length);
+function customLengthSort(a: string, b: string, increasing: boolean): number {
+    let result: number = increasing ? (a.length - b.length) : (b.length - a.length);
     return result;
 }
 
 export function lengthSort(
-    array: any[], // array we build after parsing the input
+    array: string[], // array we build after parsing the input
     increasing: boolean, // select value has to be increasing for increasing order and decreasing for decreasing order
-    separator: string,
+    joinSeparator: string,
     removeDuplicated: boolean // the value if the checkbox has been selected 1 else 0
 ) {
     array.sort((a, b) => customLengthSort(a, b, increasing));
     if (removeDuplicated) {
         array = array.filter((item, index) => array.indexOf(item) === index);
     }
-    return array.join(separator);
+    return array.join(joinSeparator);
 }
 
 // Utils function that chooses the way of alphabetic sorting mixed types of array
-function customAlphabeticSort(a: number | string, b: number | string, caseSensitive: boolean): number {
-    const stringA : string = a.toString();
-    const stringB : string = b.toString();
-
+function customAlphabeticSort(a: string, b: string, caseSensitive: boolean): number {
     if (!caseSensitive) {
         // Case-insensitive comparison
-        return stringA.toLowerCase().localeCompare(stringB.toLowerCase());
+        return  a.toLowerCase().localeCompare(b.toLowerCase());
     } else {
         // Case-sensitive comparison
-        return stringA.charCodeAt(0) - stringB.charCodeAt(0);
+        return a.charCodeAt(0) - b.charCodeAt(0);
     }
 }
 
 export function alphabeticSort(
-    array: any[], // array we build after parsing the input
+    array: string[], // array we build after parsing the input
     increasing: boolean, // select value has to be "increasing" for increasing order and "decreasing" for decreasing order
-    separator: string,
+    joinSeparator: string,
     removeDuplicated: boolean, // the value if the checkbox has been selected 1 else 0
     caseSensitive: boolean // the value if the checkbox has been selected 1 else 0
 ) 
@@ -73,5 +77,40 @@ export function alphabeticSort(
     if (removeDuplicated) {
         array = array.filter((item, index) => array.indexOf(item) === index);
     }
-    return array.join(separator);  
+    return array.join(joinSeparator);  
+}
+
+// main function 
+export function Sort(
+    sortingMethod: SortingMethod,
+    splitOperatorType: SplitOperatorType,
+    input: string, 
+    increasing: boolean,
+    splitSeparator: string,
+    joinSeparator: string,
+    removeDuplicated: boolean,
+    caseSensitive: boolean 
+) {
+    let array: string[];
+    switch(splitOperatorType) {
+        case 'symbol':
+            array = input.split(splitSeparator);
+            break;
+        case 'regex':
+            array = input.split(new RegExp(splitSeparator));
+            break;
+    }
+    let result : string;
+    switch(sortingMethod) {
+        case 'numeric':
+            result = numericSort(array, increasing, joinSeparator, removeDuplicated);
+            break;
+        case 'length':
+            result = lengthSort(array, increasing, joinSeparator, removeDuplicated);
+            break;
+        case 'alphabetic':
+            result = alphabeticSort(array, increasing, joinSeparator, removeDuplicated, caseSensitive);
+            break;
+    }
+    return result;
 }
\ No newline at end of file
diff --git a/src/pages/list/sort/sort.service.test.ts b/src/pages/list/sort/sort.service.test.ts
index d702985..0c056d8 100644
--- a/src/pages/list/sort/sort.service.test.ts
+++ b/src/pages/list/sort/sort.service.test.ts
@@ -1,12 +1,14 @@
 // Import necessary modules and functions
 import { describe, it, expect } from 'vitest';
-import { alphabeticSort, lengthSort, numericSort } from './service';
-import { BlobOptions } from 'buffer';
+import {
+    alphabeticSort, lengthSort, numericSort, Sort,
+    SplitOperatorType, SortingMethod
+} from './service';
 
 // Define test cases for the numericSort function
 describe('numericSort function', () => {
     it('should sort a list in increasing order with comma separator not removeduplicated elements', () => {
-        const array: number[] = [9, 8, 7, 4, 2, 2, 5];
+        const array: string[] = ['9', '8', '7', '4', '2', '2', '5'];
         const increasing: boolean = true;
         const separator = ', ';
         const removeDuplicated: boolean = false;
@@ -16,7 +18,7 @@ describe('numericSort function', () => {
     });
 
     it('should sort a list in decreasing order with " - " separator and remove duplicated elements', () => {
-        const array: number[] = [2, 4, 4, 9, 6, 6, 7];
+        const array: string[] = ['2', '4', '4', '9', '6', '6', '7'];
         const increasing: boolean = false;
         const separator = ' - ';
         const removeDuplicated: boolean = true;
@@ -27,7 +29,7 @@ describe('numericSort function', () => {
     });
 
     it('should sort a list with numbers and characters and remove duplicated elements', () => {
-        const array: any[] = ['d','d', 'n', 'p', 'h', 'h', 6, 9, 7, 5];
+        const array: string[] = ['d', 'd', 'n', 'p', 'h', 'h', '6', '9', '7', '5'];
         const increasing: boolean = true;
         const separator = ' ';
         const removeDuplicated: boolean = true;
@@ -40,7 +42,7 @@ describe('numericSort function', () => {
     // Define test cases for the lengthSort function
     describe('lengthSort function', () => {
         it('should sort a list of number by length in increasing order with comma separator ', () => {
-            const array: number[] = [415689521, 3, 126, 12, 1523];
+            const array: string[] = ['415689521', '3', '126', '12', '1523'];
             const increasing: boolean = true;
             const separator = ', ';
             const removeDuplicated: boolean = false;
@@ -50,7 +52,7 @@ describe('numericSort function', () => {
         });
 
         it('should sort a list of number by length in increasing order and remove duplicated elements ', () => {
-            const array: number[] = [415689521, 3, 3, 126, 12, 12,  1523];
+            const array: string[] = ['415689521', '3', '3', '126', '12', '12', '1523'];
             const increasing: boolean = true;
             const separator = ', ';
             const removeDuplicated: boolean = true;
@@ -60,7 +62,7 @@ describe('numericSort function', () => {
         });
 
         it('should sort a mixed array by length in increasing order ', () => {
-            const array: any[] = ['ddd', 'd', 'nfg', 'p', 'h', 'h', 6555, 9, 7, 5556];
+            const array: string[] = ['ddd', 'd', 'nfg', 'p', 'h', 'h', '6555', '9', '7', '5556'];
             const increasing: boolean = true;
             const separator = ' ';
             const removeDuplicated: boolean = true;
@@ -76,7 +78,7 @@ describe('numericSort function', () => {
     describe('alphabeticSort function', () => {
         // NON CASE SENSITIVE TEST
         it('should sort a list of string in increasing order with comma separator ', () => {
-            const array: any[] = ['apple', 'pineaple', 'lemon', 'orange'];
+            const array: string[] = ['apple', 'pineaple', 'lemon', 'orange'];
             const increasing: boolean = true;
             const separator = ', ';
             const removeDuplicated: boolean = false;
@@ -87,7 +89,7 @@ describe('numericSort function', () => {
         });
 
         it('should sort a list of string in decreasing order with comma separator ', () => {
-            const array: any[] = ['apple', 'pineaple', 'lemon', 'orange'];
+            const array: string[] = ['apple', 'pineaple', 'lemon', 'orange'];
             const increasing: boolean = false;
             const separator = ', ';
             const removeDuplicated: boolean = false;
@@ -98,7 +100,7 @@ describe('numericSort function', () => {
         });
 
         it('should sort a list of string and symbols (uppercase and lower) in increasing order with comma separator ', () => {
-            const array: any[] = ['Apple', 'pineaple', 'lemon', 'Orange', 1, 9, '@', '+'];
+            const array: string[] = ['Apple', 'pineaple', 'lemon', 'Orange', '1', '9', '@', '+'];
             const increasing: boolean = true;
             const separator = ' ';
             const removeDuplicated: boolean = true;
@@ -106,10 +108,10 @@ describe('numericSort function', () => {
 
             const result = alphabeticSort(array, increasing, separator, removeDuplicated, caseSensitive);
             expect(result).toBe('@ + 1 9 Apple lemon Orange pineaple');
-        }); 
+        });
 
         it('should sort a list of string and symbols (uppercase and lower) in decreasing order with comma separator ', () => {
-            const array: any[] = ['Apple', 'pineaple', 'lemon', 'Orange', 1, 9, '@', '+'];
+            const array: string[] = ['Apple', 'pineaple', 'lemon', 'Orange', '1', '9', '@', '+'];
             const increasing: boolean = false;
             const separator = ' ';
             const removeDuplicated: boolean = true;
@@ -117,12 +119,12 @@ describe('numericSort function', () => {
 
             const result = alphabeticSort(array, increasing, separator, removeDuplicated, caseSensitive);
             expect(result).toBe('pineaple Orange lemon Apple 9 1 + @');
-        }); 
+        });
 
 
         // CASE SENSITIVE TEST
         it('should sort a list of string (uppercase) in decreasing order with comma separator ', () => {
-            const array: any[] = ['Apple', 'Pineaple', 'Lemon', 'Orange'];
+            const array: string[] = ['Apple', 'Pineaple', 'Lemon', 'Orange'];
             const increasing: boolean = false;
             const separator = ' ';
             const removeDuplicated: boolean = false;
@@ -133,7 +135,7 @@ describe('numericSort function', () => {
         });
 
         it('should sort a list of string (uppercase and lowercase) in increasing order with comma separator ', () => {
-            const array: any[] = ['Apple', 'pineaple', 'lemon', 'Orange', 1, 9];
+            const array: string[] = ['Apple', 'pineaple', 'lemon', 'Orange', '1', '9'];
             const increasing: boolean = true;
             const separator = ' ';
             const removeDuplicated: boolean = true;
@@ -141,10 +143,10 @@ describe('numericSort function', () => {
 
             const result = alphabeticSort(array, increasing, separator, removeDuplicated, caseSensitive);
             expect(result).toBe('1 9 Apple Orange lemon pineaple');
-        });  
-        
+        });
+
         it('should sort a list of string (uppercase and lower) in decreasing order with comma separator ', () => {
-            const array: any[] = ['Apple', 'pineaple', 'lemon', 'Orange', 1, 9];
+            const array: string[] = ['Apple', 'pineaple', 'lemon', 'Orange', '1', '9'];
             const increasing: boolean = false;
             const separator = ' ';
             const removeDuplicated: boolean = true;
@@ -152,10 +154,10 @@ describe('numericSort function', () => {
 
             const result = alphabeticSort(array, increasing, separator, removeDuplicated, caseSensitive);
             expect(result).toBe('pineaple lemon Orange Apple 9 1');
-        }); 
+        });
 
         it('should sort a list of string and symbols (uppercase and lower) in decreasing order with comma separator ', () => {
-            const array: any[] = ['Apple', 'pineaple', 'lemon', 'Orange', 1, 9, '@', '+'];
+            const array: string[] = ['Apple', 'pineaple', 'lemon', 'Orange', '1', '9', '@', '+'];
             const increasing: boolean = true;
             const separator = ' ';
             const removeDuplicated: boolean = true;
@@ -166,7 +168,7 @@ describe('numericSort function', () => {
         });
 
         it('should sort a list of string and symbols (uppercase and lower) in decreasing order with comma separator ', () => {
-            const array: any[] = ['Apple', 'pineaple', 'lemon', 'Orange', 1, 9, '@', '+'];
+            const array: string[] = ['Apple', 'pineaple', 'lemon', 'Orange', '1', '9', '@', '+'];
             const increasing: boolean = false;
             const separator = ' ';
             const removeDuplicated: boolean = true;
@@ -174,10 +176,40 @@ describe('numericSort function', () => {
 
             const result = alphabeticSort(array, increasing, separator, removeDuplicated, caseSensitive);
             expect(result).toBe('pineaple lemon Orange Apple @ 9 1 +');
-        }); 
+        });
+    });
 
+    // Define test cases for the lengthSort function
+    describe('main function', () => {
+        it('should do everything alph', () => {
+            const sortingMethod: SortingMethod = 'alphabetic';
+            const splitOperatorType : SplitOperatorType = 'symbol';
+            const input: string = 'Apple pineaple lemon Orange 1 9 @ +';
+            const increasing: boolean = true;
+            const splitSeparator: string = ' ';
+            const joinSeparator: string = ' ';
+            const removeDuplicated: boolean = true;
+            const caseSensitive: boolean = true;
 
+            const result = Sort(sortingMethod, splitOperatorType, input, increasing, splitSeparator, joinSeparator, removeDuplicated, caseSensitive);
+            expect(result).toBe('+ 1 9 @ Apple Orange lemon pineaple');
+        });
+
+        it('should do everything numeric', () => {
+            const sortingMethod: SortingMethod = 'numeric';
+            const splitOperatorType : SplitOperatorType = 'symbol';
+            const input: string = '1 6 9 4 6 7 3 5 8';
+            const increasing: boolean = true;
+            const splitSeparator: string = ' ';
+            const joinSeparator: string = ' ';
+            const removeDuplicated: boolean = true;
+            const caseSensitive: boolean = true;
+
+            const result = Sort(sortingMethod, splitOperatorType, input, increasing, splitSeparator, joinSeparator, removeDuplicated, caseSensitive);
+            expect(result).toBe('1 3 4 5 6 7 8 9');
+        });
 
 
     });
+
 });
\ No newline at end of file
diff --git a/src/utils/string.ts b/src/utils/string.ts
index 7662701..785aa00 100644
--- a/src/utils/string.ts
+++ b/src/utils/string.ts
@@ -2,3 +2,7 @@ export function capitalizeFirstLetter(string: string | undefined) {
   if (!string) return '';
   return string.charAt(0).toUpperCase() + string.slice(1);
 }
+
+export function isNumber(number: any) {
+  return !isNaN(parseFloat(number)) && isFinite(number);
+}
\ No newline at end of file