import java.io.InputStreamReader;
import java.io.BufferedReader;

public class Map {
	private static int to24 (int hour, boolean pm) {
		if (pm) {
			if (hour != 12) {
				return hour + 12;
			} else {
				return hour;
			}
		} else {
			if (hour == 12) {
				return 24;
			} else {
				return hour;
			}
		}
	}

	public static void main (String[] args) throws Throwable {
		InputStreamReader stream = new InputStreamReader(System.in);
		BufferedReader reader = new BufferedReader(stream);

		int[] distances = {450, 140, 125, 365, 250, 160, 380, 235, 320, 0};

		for (int i = 0; i < 5; i++) {
			String[] input = reader.readLine().split(", ");

			int cityA = input[0].charAt(0) - 65;
			int cityB = input[1].charAt(0) - 65;

			int startA = Integer.parseInt(input[2]);
			int startB = Integer.parseInt(input[4]);

			boolean pmA = (input[3].equals("PM")) ? true : false;
			boolean pmB = (input[5].equals("PM")) ? true : false;

			int speedA = Integer.parseInt(input[6]);
			int speedB = Integer.parseInt(input[7]);

			startA = to24(startA, pmA);
			startB = to24(startB, pmB);

			double distance = 0;

			for (int j = cityA; j < cityB; j++) {
				distance += distances[j];
			}

			int difference;

			if (Math.abs(startA - startB) <= 12) {
				difference = startA - startB;
			} else {
				difference = (Math.abs(startA - startB) - 24);
			}

			double time = 60 * (distance - speedB * (difference)) / (speedA + speedB);

			int hour = (int) time / 60;
			int minutes = (int) Math.round(time % 60);

			System.out.printf("%d:%02d\n", hour, minutes);
		}
	}
}