public class optional {
public static String solution(String S) {
    int hour = Integer.parseInt(S.substring(0, 2));
    int min = Integer.parseInt(S.substring(3, 5));
    while (true) {
        if (++min == 60) {
            min = 0;
            ++hour;
            hour %= 24;
        }
        String printOut = String.format("%02d:%02d", hour, min);
        Boolean bool = true;
        for (int i = 0; i < printOut.length(); ++i)
            if (S.indexOf(printOut.charAt(i)) < 0) {
                bool = false;
                break;
            }
        if (bool) return printOut;
    }
}


public static void main(String[] args) {
    System.out.println(solution("11:01"));



}