diff --git a/medium/count_vowel_strings_in_ranges.py b/medium/count_vowel_strings_in_ranges.py
new file mode 100644
index 0000000..5ae07f9
--- /dev/null
+++ b/medium/count_vowel_strings_in_ranges.py
@@ -0,0 +1,24 @@
+# https://leetcode.com/problems/count-vowel-strings-in-ranges
+
+from typing import List
+
+VOWEL = {
+    'a': True,
+    'e': True,
+    'i': True,
+    'o': True,
+    'u': True,
+}
+class Solution:
+    def vowelStrings(self, words: List[str], queries: List[List[int]]) -> List[int]:
+        sums = [0]
+        for word in words:
+            if word[0] in VOWEL and word[-1] in VOWEL:
+                sums.append(sums[-1] + 1)
+            else:
+                sums.append(sums[-1])
+        result = []
+        for [start, end] in queries:
+            result.append(sums[end + 1] - sums[start])
+        return result
+