BeerTime

import java.util.Scanner;

public class Homework11 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String input = scanner.nextLine();
        String time = "";
        int hour = 0;
        int minute = 0;

        if (input.length() == 7){
            time = input.substring(input.length()-2);
            hour = Integer.parseInt(input.substring(0, 1));
            minute = Integer.parseInt(input.substring(2, 4));
        } else if (input.length() == 8) {
            time = input.substring(input.length()-2);
            hour = Integer.parseInt(input.substring(0, 2));
            minute = Integer.parseInt(input.substring(3, 5));

        }
        if ("PM".equals(time)) {
            switch (hour) {
                case 0:
                    System.out.println("non-beer time");
                    break;
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                case 6:
                case 7:
                case 8:
                case 9:
                case 10:
                case 11:
                case 12:
                    System.out.println("beer time");
                    break;
            }
        } else if ("AM".equals(time)) {
            switch (hour) {
                case 0:
                case 1:
                case 2:
                    System.out.println("beer time");
                    break;
                case 3:
                case 4:
                case 5:
                case 6:
                case 7:
                case 8:
                case 9:
                case 10:
                case 11:
                case 12:
                    System.out.println("non-beer time");
                    break;
            }
        }


    }
}