#ExamSchedule

import java.util.Scanner;

public class ExamSchedule {

    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);

        int startHour = scan.nextInt();
        int startMins = scan.nextInt();
        String partOfDay = scan.next();
        int durationHours = scan.nextInt();
        int durationMins = scan.nextInt();

        int endHour = startHour + durationHours;
        int endMins = startMins + durationMins;

        switch (partOfDay) {
        case "PM":
            if (endMins > 59) {
                endMins = endMins % 60;
                endHour ++;
            }
            if (endHour >= 12) {
                endHour = endHour % 12;
                if (endHour == 0 || endHour == 24) {
                    endHour = 12;
                }
                partOfDay = "AM";
            }
            break;
        case "AM":
            if (endMins > 59) {
                endMins = endMins % 60;
                endHour++;
            }
            if (endHour >= 12) {
                endHour = endHour % 12;
                if (endHour == 0 || endHour == 24) {
                    endHour = 12;
                }
                partOfDay = "PM";
            }
        }
        System.out.printf("%02d:%02d:%s", endHour, endMins, partOfDay);
    }
}