Time Conversion

import java.io.*;
import java.math.*;
import java.text.*;
import java.util.*;
import java.util.regex.*;

public class Solution {

    /*
     * Complete the timeConversion function below.
     */
    static String timeConversion(String s) {
        /*
         * Write your code here.
         */
         if(s.charAt(8)=='A')
          {
             String smb=s.substring(0,2);
             int i=Integer.parseInt(smb);
              if(i==12)
              {
                String sb="00" +s.substring(2,8);
                return sb; 
              }
              else{
              String sb = s.substring(0,8);
              return sb;
              }
              
          }
          else{
              String smb=s.substring(0,2);
             int i=Integer.parseInt(smb);
              if(i==12)
              {
               String sb = s.substring(0,8);
              return sb; 
              }
              else{
              String sb=s.substring(0,2);
       
              i+=12;
             String sd=Integer.toString(i); 
              sb=sd +s.substring(2,8);
              return sb;
              }
          }
   
         

    }

    private static final Scanner scan = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        BufferedWriter bw = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        String s = scan.nextLine();

        String result = timeConversion(s);

        bw.write(result);
        bw.newLine();

        bw.close();
    }
}