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class Solution {
    public String solution(String s) {
        String answer = "";
        String[] list = s.split(" ");
        for(int i=0;i<list.length;i++)
        {
            String[] ar = list[i].split("");
            for(int j=0;j<ar.length;j++)
            {
                if(j%2==0)
                {
                    ar[j] = ar[j].toUpperCase();
                    answer += ar[j];
                }
                if(j%2!=0)
                {
                    ar[j] = ar[j].toLowerCase();
                    answer += ar[j];
                }
            }
            if(answer.length()==s.length())
            {
                break;
            }
            answer += " ";
        }
        return answer;
    }
}