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def solution(s):
    answer = ''
    s=s.lower()
 
    k = s.split(" ")
 
    for i in range(0,len(k)):
        n = list(k[i])
 
        for j in range(0,len(n)):
            if j%2!=0:
                answer+=n[j]
            else:
                answer+=n[j].upper()
        if i==len(k)-1:
            break
        answer+=" "
 
 
    return answer
 
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