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

public class ii {
	public static BufferedReader in = new BufferedReader( new InputStreamReader(System.in));
	public static Calendar c = Calendar.getInstance();


	public static void main(String [] args) throws Exception {
		c.setLenient(false);
		while(true){
			String line=in.readLine();

			if(line.equals("end")) break;

			if(line.length() < 10 || line.length() > 11) {
				System.out.println("invalid");
				continue;
			}

			for(int i=0; i<line.length(); i++){
				if(i!=6 && ( line.charAt(i)<'0' || line.charAt(i)>'9' ) ) {
				System.out.println("invalid");
				continue;
				}
			}

			if(line.charAt(6) != '/'){
				System.out.println("invalid");
				continue;
			}

			if(Integer.parseInt(line.substring(0,2)) < 20 && Integer.parseInt(line.substring(0,2)) > 9){
				System.out.println("invalid");
				continue;
			}

			if(Integer.parseInt(line.substring(0,2)) >= 54 && line.length() != 11){
				System.out.println("invalid");
				continue;
			}

			if(Integer.parseInt(line.substring(0,2)) < 54 && Integer.parseInt(line.substring(0,2)) >= 20 && line.length() != 10){
				System.out.println("invalid");
				continue;
			}

			//check valid date
			int y = Integer.parseInt(line.substring(0,2)); 
			int m = Integer.parseInt(line.substring(2,4));
			int d = Integer.parseInt(line.substring(4,6));

			if(!(( m > 0 && m <=12) || (m >50 && m <= 62 ))){
				System.out.println("invalid");
				continue;
			}

			if(!( d > 0 && d <=31)){
				System.out.println("invalid");
				continue;
			}

                        int addition = 0;
			if (y >= 20 && y <= 99)
			  addition = 1900;
                        else
			  addition = 2000;

			try {
				c.set(Calendar.DAY_OF_MONTH, d);
                		c.set(Calendar.MONTH, m>12 ? m-51 : m-1);
                		c.set(Calendar.YEAR, addition+y);
				c.get(Calendar.MONTH);
				c.get(Calendar.DAY_OF_MONTH); 
				c.get(Calendar.YEAR);
			} catch (Exception ex) {
  				System.out.println("invalid");
				continue;
			}
			
			/*if(c.get(Calendar.MONTH) != (m>12 ? m-51 : m-1) || c.get(Calendar.DAY_OF_MONTH) != d || c.get(Calendar.YEAR) != addition+y){
				System.out.println("invalid");
				continue;
			}*/

			long tmp= Long.parseLong(line.substring(0,6) + line.substring(7,line.length()));
			if(line.length()==11 && tmp%11 != 0){
				System.out.println("invalid");
				continue;
			}
			if(line.charAt(2)=='5'|| line.charAt(2)=='6')
				System.out.println("girl");
			else
				System.out.println("boy");

		}
	}
}