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

public class ii {
  

  public static void main(String[] args) throws IOException {

    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

    String line;
 
    

    while ((line = reader.readLine().trim()) != null) {

//      System.out.println(line);

      if ("end".equals(line)) {
	 //System.out.prlongln("end");
	 return;
      }

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

      if (line.indexOf("/", 7)!=-1) { // and only
	System.out.println("invalid");
	continue;
      }

      // parametry na radku
      String[] params = line.split("/");
      long[] num = toInts(params);

      long date = num[0];
      long code = num[1];
      
      long y = (date/10000);
      int m = ((int)date/100)%100;
      long d = (date)%100;

      if (y<10) {
	  y+=2000;
      }else if (20<=y) {
	  y+=1900;
      } else {
	System.out.println("invalid");
	continue;
      }

      String gender;

      if ((51<=m)&&(m<=62)) {	
	gender = "girl"; m-=50;
      } else if ((1<=m)&&(m<=12)) {	
	gender = "boy";
      } else {
	System.out.println("invalid");
	continue;
      }

      long dlimit = 31;

      switch (m) {
	case 2:
	  dlimit = 28;
	  break;
	case 4:
	case 6:
	case 9:
	case 11:
	  dlimit = 30;
	  break;
      }

      if ((m==2)&&(((y%4==0)&&(y%400!=0))||(y%2000==0))) {
	dlimit = 29;
      }

      if ((1<=d)&&(d<=dlimit)) {	
      } else {	
	System.out.println("invalid");
	continue;
      }

      if (y<=1953) {
	if (params[1].length()==3) {
	  System.out.println(gender);	
	  continue;
	} else {
	  System.out.println("invalid");
	  continue;
	}
      } else {
	if (params[1].length()==4) {
	  if (((10000*num[0]+num[1])%11)==0) { 
	    System.out.println(gender);	
	    continue;
	  } else {
	    System.out.println("invalid");// 10  "+	  (10000*num[0]+num[1])  );
	    continue;
	  }
	} else {
	  System.out.println("invalid");
	  continue;
	}
      }
     

    }


  }

  public static long toInt(String text) {
    return Long.parseLong(text);
  }

  public static long[] toInts(String[] texts) {
      long[] nums = new long[texts.length];
      for (int i = 0; i<texts.length; i++) {
	nums[i] = toInt(texts[i]);
      }
    return nums;
  }

  public static long checksum(long num) {
      long sum = 0;
      for (; num>0; num/=10) {
	sum += num%10;
      }
      return sum;
  }


}