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class Solution {
    public String solution(String s) {
        String[] strArr = s.split(" ");
        StringBuilder sb = new StringBuilder();

        for (String val : strArr) {
            String[] strArr2 = val.split("");
            for (int i = 0; i < strArr2.length; i++) {
                if (i%2 == 0) {
                    String str = strArr2[i];
                    str = str.toUpperCase();
                    sb.append(str);
                } else {
                    String str = strArr2[i];
                    str = str.toLowerCase();
                    sb.append(str);
                }
            }
            sb.append(" ");
        }

        return sb.toString().trim();
    }
}