题目 1033: [编程入门]自定义函数之字符提取

def fun(str):
   ls = []
   for i in str:
       if i == 'a' or i == 'e' or i == 'i' or i == 'o' or i == 'u':
           ls.append(i)
   return ls

str = input()
ls = fun(str)
for i in range(len(ls)):
   print(ls[i], end="")