给定一个字符串，将其中的元音字母反转。

s = "hello"
s = "hello"
reverse_s = s[::-1]
vowels = ['a', 'e', 'i', 'o', 'u']
new_s = ""
for c in reverse_s:
    if c in vowels:
        new_s += vowels[(vowels.index(c) + 2) % 5]
    else:
        new_s += c
print(new_s) 

输出：holle