import java.util.Scanner;
import java.util.Calendar;

public class ii {

	
	static Scanner sc = new Scanner(System.in);
	
	
	public static boolean validate(String line) {
	
		int i;
		int lomeno = 0;
		
		if (line.length() < 10 || line.length() > 11) return false;
		
		for (i=0; i< line.length(); i++) {
		
			if ( line.charAt(i) == '/' ) {
				lomeno ++;
				continue;
			}
			if ( line.charAt(i) < '0' || line.charAt(i) > '9' )
				return false;
			
		}
		
		if (lomeno != 1 ) return false;
		
		
		return true;
	
	}
	
	public static Calendar getCalendar(String line) {
	
		Calendar calendar = Calendar.getInstance();
		calendar.setLenient(false);
		
		int year = Integer.parseInt(line.substring(0,2));
		int month = Integer.parseInt(line.substring(2,4));
		int day = Integer.parseInt(line.substring(4,6));
		
		
		month -= 1;
		if (year < 20 && year > 9) return null;
		if (year < 10) year += 2000;
		else year += 1900;
		
		
		boolean prestup = false;
		if (month == 1) {
			if (year % 4 == 0 ) prestup = true;
		 	if (year % 100 == 0) prestup = false;
		 	if (year % 1000 == 0 && year % 4 == 0) prestup = true;
	     
	     		if (prestup == false && day > 28) return null;
			if (prestup == true && day > 29) return null;

	     
		}
		
		
		
			calendar.set( year, (month >= 50)? month - 50 : month, day );
		
		try {
			if (calendar.get(Calendar.DAY_OF_MONTH) != day ) 
				System.out.println("exception");
		} catch (Exception e) {
			return null;
		}
		
		Calendar min = Calendar.getInstance();
		min.setLenient(false);
		min.set(1953,11, 31);
		
		if (calendar.after(min)) { 
			
			
			Long cislo = Long.parseLong(line.replace("/", ""));
		
			if ( cislo % 11 == 0) {}
				else return null;
		} 
		if (calendar.before(min)) { 
	
			if ( line.substring(line.indexOf('/') +1, line.length()  ).length() == 4   ) return null;
		
		}
	
		return calendar;
	}

	public static void main(String []args) {
	
		Calendar min = Calendar.getInstance();
		min.set(1920, 0, 1);
		min.setLenient(false);
	
		Calendar max = Calendar.getInstance();
		max.set(2009, 11, 31);
		max.setLenient(false);
	
		String line;
	
		while(true) {
		
			line = sc.nextLine();
			
			if (line.equals("end")) break;
			
			if ( validate(line )) {
				
				Calendar calendar = getCalendar(line);
				if ( calendar == null) {
					System.out.println("invalid");
				} else {
				
					if ( calendar.after(min) && calendar.before(max) ) {
						if ( line.charAt(2) == '5' || line.charAt(2) == '6') 
							System.out.println("girl");
						else 
							System.out.println("boy");
						
					} else {
						System.out.println("invalid");
					}
				
				}
				
			}
			else 
				System.out.println("invalid");
		
		
		
		}
		
		
		




	}









}