프로그래머스 - 모음사전 (L2)

 1def solution(word):
 2    answer = 0
 3    char = ['A', 'E', 'I', 'O', 'U']
 4    cnt = 0
 5
 6    def traverse(cur):
 7        nonlocal char, cnt, word
 8        if cur == word:
 9            return cnt
10
11        if len(cur) < 5:
12            for ch in char:
13                cnt += 1
14                if traverse(cur+ch) != None:
15                    return cnt
16    return traverse('')