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-rw-r--r--challenge-254/steven-wilson/python/ch-02.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/challenge-254/steven-wilson/python/ch-02.py b/challenge-254/steven-wilson/python/ch-02.py
index 3d2a7d6821..9a9fc09f62 100644
--- a/challenge-254/steven-wilson/python/ch-02.py
+++ b/challenge-254/steven-wilson/python/ch-02.py
@@ -1,7 +1,7 @@
#!/usr/bin/env python3
-VOWELS = ['a', 'e', 'i', 'o', 'u']
+VOWELS = set('aeiou')
def reverse_vowels(string):