diff --git a/src/arrayMethodSort.js b/src/arrayMethodSort.js
index 32363d0d..6fab9e65 100644
--- a/src/arrayMethodSort.js
+++ b/src/arrayMethodSort.js
@@ -4,8 +4,33 @@
  * Implement method Sort
  */
 function applyCustomSort() {
-  [].__proto__.sort2 = function(compareFunction) {
-    // write code here
+  [].__proto__.sort2 = function (compareFunction) {
+    const cmp =
+      compareFunction ??
+      function (s1, s2) {
+        if (s1 === null || s2 === undefined) {
+          return 1;
+        }
+
+        return s1?.toString() > s2?.toString()
+          ? 1
+          : s1?.toString() < s2?.toString()
+            ? -1
+            : 0;
+      };
+
+    for (let i = 0; i < this.length - 1; i++) {
+      for (let j = 0; j < this.length - 1 - i; j++) {
+        if (cmp(this[j], this[j + 1]) > 0) {
+          const item = this[j];
+
+          this[j] = this[j + 1];
+          this[j + 1] = item;
+        }
+      }
+    }
+
+    return this;
   };
 }