#139 백준 파이썬 [2744] 대소문자 바꾸기

https://www.acmicpc.net/problem/2744

 

#Solution

word = list(str(input()))
answer = []

for character in word:
    if character in 'abcdefghijklmnopqrstuvwxyz':
        answer.append(character.upper())
    else:
        answer.append(character.lower())

for character in answer:
    print(character, end = '')