#
# 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
        a = s.split(" ")
        a.reverse()
        print(a)
        t = ""
        print()
        for i in a:
            print(i)
            for j in i:
                if "a" <= j <= "z":
                    t = t + j.upper()
                else:
                    t = t + j.lower()
            t = t + " "
        return t[:n]