2056. 연월일 달력

import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Solution {
 
    static String Answer;
    static int[] dayofMonth = {0, 31,28,31,30,31,30,31,31,30,31,30,31}; 
    static String answer;
 
    public static void main(String[] args) throws Exception {
 
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        //BufferedReader br = new BufferedReader(new FileReader("input.txt"));
 
        int T = Integer.parseInt(br.readLine());
        for(int test_case = 0; test_case < T; test_case++) {
            String s = br.readLine();
            int month = Integer.parseInt(s.substring(4, 6));
            int day = Integer.parseInt(s.substring(6, 8));
            if (month >0 && month <13 && day >0 && day<=dayofMonth[month]) {
                answer = String.format("%s/%s/%s", s.substring(0,4), s.substring(4,6), s.substring(6,8));
 
            }
            else {
                answer = "-1";
            }
 
             System.out.format("#%d %s", (test_case+1), answer);
             System.out.println();
        }
        br.close();
    }
}