diff --git a/codeflash/test.py b/codeflash/test.py
new file mode 100644
index 000000000..39b6ac3b3
--- /dev/null
+++ b/codeflash/test.py
@@ -0,0 +1,21 @@
+class Solution:
+    _vowels = set("aeiouAEIOU")  # noqa: RUF012
+
+    def reverseVowels(self, s: str) -> str:
+        left, right = 0, len(s) - 1
+        chars = list(s)
+        vowels = self._vowels  # Local variable for faster lookup
+
+        while left < right:
+            # Advance left pointer to next vowel
+            while left < right and chars[left] not in vowels:
+                left += 1
+            # Advance right pointer to previous vowel
+            while left < right and chars[right] not in vowels:
+                right -= 1
+            if left < right:
+                chars[left], chars[right] = chars[right], chars[left]
+                left += 1
+                right -= 1
+
+        return "".join(chars)