import java.io.*;
import java.util.*;

public class ii{

	StringTokenizer st = new StringTokenizer("");
	BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
	
	public boolean run() throws IOException{
		String s, s1, s2;
		s = nextToken();
		boolean koniec = false;
		if(s.equals("end"))return false;
		if(s.length() >= 9){					
			s1 = s.substring(0,6);
			s2 = s.substring(7,s.length());
			int s1dlzka = s1.length();
			int s2dlzka = s2.length();
			if (s1dlzka == 6){
				if((Integer.parseInt(String.valueOf(s1.charAt(1))) <= 3 && s2dlzka==3) || ((Integer.parseInt(String.valueOf(s1.charAt(1))) > 3) && (s2dlzka==4))){
					if(mesiacOk(s1.substring(2,4))){
						if(denOk(s1.substring(4,s1dlzka))){
							if(chlapec(s1.substring(2,4))){
								System.out.println("boy");
							}else System.out.println("girl");						
						}else System.out.println("invalid");
					}else System.out.println("invalid");
				}else System.out.println("invalid");
			}else System.out.println("invalid");
		}else System.out.println("invalid");
		
					
		return true;
	}

	public boolean denOk(String s){
		int i = Integer.parseInt(s);
		if((i>0 && i<32)){
			return true;
		}else return false;		
	}

	public boolean mesiacOk(String s){
		int i = Integer.parseInt(s);
		if((i>0 && i<13) || (i>50 && i<63)){
			return true;
		}else return false;		
	}

	public boolean chlapec(String s){
		int i = Integer.parseInt(s);
		if((i>0 && i<13)){
			return true;
		}else return false;		
	}


	public String nextToken() throws IOException{
		while(!st.hasMoreTokens()) st = new StringTokenizer(stdin.readLine());
		return st.nextToken();
	}

	public static void main(String[] argv) throws IOException{
		ii start = new ii();	
		while(start.run()){}
	}
}