[프로그래머스][Python] 이상한 문자 만들기

def solution(s):
    word = s.split()
    word
    words=[]
    for i in word:
        output=""
        for j,k in enumerate(i):
            if j%2==0:
                k = k.upper()
                output+=k
            else :
                k=k.lower()
                output+=k
        words.append(output)
        
            
    words = " ".join(words)
    return words