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;
		
		if (line.charAt(6) != '/') return false;
		
		
		for (i=0; i< line.length(); i++) {
		
			if ( i == 6 ) {
				continue;
			}
			if ( line.charAt(i) < '0' || line.charAt(i) > '9' )
				return false;
			
		}
		
		
		
		
		return true;
	
	}
	
	public static Calendar getCalendar(String line) {
	
		Calendar calendar = Calendar.getInstance();
		calendar.setLenient(true);
		
		int year = Integer.parseInt(line.substring(0,2));
		int oMonth = Integer.parseInt(line.substring(2,4));
		int day = Integer.parseInt(line.substring(4,6));
		
		if (oMonth > 62) return null;
		if (oMonth < 50 && oMonth > 12) return null;
		if (oMonth == 0) return null;
		if (day == 0) return null;
		if (day > 31) return null;
		
		
		int month = (oMonth >= 50)? oMonth - 50 : oMonth;
		month -= 1;
		
		if (year < 20 && year > 9) return null;
		if (year < 10) year += 2000;
		else year += 1900;
		
		if (year < 1920) return null;
		if (year > 2009) return null;
		
		
		if (month > 11) return null;
		
		
			calendar.set( year, month, day );
			
			if ( calendar.get(Calendar.YEAR) != year) return null;
			if ( calendar.get(Calendar.MONTH) != month) return null;
			if ( calendar.get(Calendar.DAY_OF_MONTH) != day) 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() != 3   ) return null;
		
		} else 
			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(2010, 0, 1);
		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");
		
		
		
		}
		System.out.println();
		
		




	}









}