from os import nice
#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param s string字符串 
# @param n int整型 
# @return string字符串
#
class Solution:
    def trans(self , s: str, n: int) -> str:
        # write code here
        words = s.split(' ')
        words = words[::-1]
        lens = len(words)
        for i in range(lens):
            words[i] = words[i].swapcase()
        return ' '.join(words)