programmers level 1: 이상한 문자 만들기

# -*- coding: utf-8 -*-
# UTF-8 encoding when using korean
def solution(s):
	word = s.split(' ')
	ans = []
	for i in word:
		new = ''
		for j in range(len(i)):
			if(j % 2 == 0):
				new += i[j].upper()
			elif(j % 2 == 1):
				new += i[j].lower()
		ans.append(new)
	return print(" ".join(ans))

if __name__ == "__main__":
	s = input()
	solution(s)