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

public class ii
{
	public static void main(String[] args) throws IOException
	{		
		Scanner sc = new Scanner(System.in);
		String line;
		int[] znak = new int[4];

			do
			{
				try
				{
					line = sc.nextLine();	
					if(line.compareTo("end") == 0) break; 
					int year = Integer.parseInt(line.substring(0,2));
					//System.out.println(year);
					int month = Integer.parseInt(line.substring(2,4));
					int day = Integer.parseInt(line.substring(4,6));
					//System.out.println(year+" "+month+" "+day);
					String out;
					if(line.length() > 11)
					{
						System.out.println("invalid");
						continue;					
					}
					
					if(line.substring(6,7).compareTo("/") != 0)
					{
						System.out.println("invalid");
						continue;
					}					
					
					if((year > 53) || (year < 10))
					{
						out = line.substring(7,11);
						//System.out.println(out);
					}
					else
					{
						out = line.substring(7,10);
					}
					
					if(out.length() >= 3)
					{
						long x = Long.parseLong(line.substring(0,6).concat(out));
						//System.out.println(x+"!!");						
						if((x % 11) != 0)
						{
							System.out.println("invalid");
							continue;
						}						
					}
					
					if((day > 28)&&(month == 2))
					{
						if ((day == 29) && ((year%4) == 0))
						{						
						}			
						else
						{
							System.out.println("invalid");
							continue;												
						}			
					}
					
					if(day > 30)
					{
						int month2 = month;
						if(month2 > 50)
						{
							month2 -= 50;
							
						}
						if((month2 == 4)||(month2 == 6)||(month2 == 9)||(month2 == 11))
						{
							System.out.println("invalid");
							continue;							
						}
					}
					
					if(day > 31)
					{
						int month2 = month;
						if(month2 > 50)
						{
							month2 -= 50;
							
						}
						if((month2 == 1)||(month2 == 3)||(month2 == 5)||(month2 == 7)||(month2 == 8)||(month2 == 10)||(month2 == 12))
						{
							System.out.println("invalid");
							continue;							
						}
					}		
					int month2 = month;
					if(month2 > 50)
					{
						month2 -= 50;						
					}				
					if((month2 > 12)||(month2 == 0))
					{
						System.out.println("invalid");
						continue;						
					}
					
					if(month > 50)
					{
						System.out.println("girl");
					}
					else
					{
						System.out.println("boy");
					}
					
					/*
					if(line.length() < 10)
					{
						System.out.println("invalid");
						continue;
					}
					//System.out.println(line.substring(6,7));
					if(line.substring(6,7).compareTo("/") != 0)
					{
						System.out.println("invalid");
						continue;
					}	
					*/
			 	}
				catch(Exception e)
				{
					System.out.println("invalid");
				}			 	
			} while(1==1);			

		//int pocet = Integer.parseInt(line);		
		
	}
}