import java.util.*;
import java.time.*;

class Clock {

    LocalTime time;

    public Clock (int hour, int minute) {

         this.time = LocalTime.of (hour, minute);

    }

    public LocalTime getTime() {

        return time;

    }

    public String toString() {

        return String.valueOf(time);

    }

    public LocalTime addMinutes (int minutes) {

        time = time.plusMinutes(minutes);

        return time;

    }

}





class Program {

    public static void main (String[] args) {

        List<Clock> clocks = new LinkedList<>();

        clocks.add (new Clock (12, 15));
        clocks.add (new Clock (14, 25));
        clocks.add (new Clock (17, 34));
        clocks.add (new Clock (23, 59));

        System.out.println(clocks);

        List<Clock> clocksAfterAddMinutes = new LinkedList<>();

        for (int i=0; i<clocks.size(); i++) {

            System.out.println(clocks.get(i).addMinutes(1));

        };

    }

}