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class Solution {
    public String solution(String s) {
        char[] arr = s.toCharArray();
        StringBuilder builder = new StringBuilder();
        
        int idx = 0;
        for (int i=0; i<arr.length; i++) {
            if (arr[i] == ' ') {
                idx = 0;
                builder.append(' ');
                continue;
            }
            if (idx % 2 == 0) builder.append(Character.toUpperCase(arr[i]));
            else builder.append(Character.toLowerCase(arr[i]));
            idx += 1;
        }
        
        return builder.toString();
        
    }
}