#include <stdio.h>
#include <math.h>
#include <string.h>

#define LINELENGTH 15

int str2ints(char * string, int ** ints, int * intslength)
{
  int slength;
  int * tempints;
  int tempintslength;
  char buffer[LINELENGTH];

  slength = strlen(string);
  tempintslength = 4;

  if (string[0] == 'e')
  {
    *ints = NULL;
    *intslength = 0;

    return (-2);
  }

  if (slength < 10)
	return(-1);

  tempints = (int*) malloc(4 * sizeof(*tempints));

 strncpy(buffer,string,6);
 strcat(buffer,string+7);
 if ((atoi(buffer) % 11) != 0)
	return(-1);

  strncpy(buffer,string,2);
  buffer[3] = 0;
  tempints[0] = atoi(buffer);

  strncpy(buffer,string+2,2);
  buffer[3] = 0;
  tempints[1] = atoi(buffer);
  if ((tempints[1] < 1) || ((tempints[1] > 12) && (tempints[1] < 51)) || (tempints[1] > 62))
	return (-1);

  strncpy(buffer,string+4,2);
  buffer[3] = 0;
  tempints[2] = atoi(buffer);
  if ((tempints[2] < 1) || (tempints[2] > 31))
	return (-1); 
  if (((tempints[1] == 2) || (tempints[1] == 4) || (tempints[1] == 6) || (tempints[1] == 9) || (tempints[1] == 11)) && ((tempints[2] > 30))) 
	return (-1);
  if (((tempints[1] == 2)) && (tempints[2] > 29)) 
	return (-1);
  if ((tempints[1] == 2) && ((tempints[0] % 4) != 0) && (tempints[2] > 28)) 
	return (-1);


  if ((tempints[0] < 54) && (slength != 10));
	return(-1);
  if ((tempints[0] > 54) && (slength != 11));
	return(-1);

  *ints = tempints;
  *intslength = tempintslength;

  if ((tempints[1] >= 1) && (tempints[1] <= 12))
  	return (0);
  if ((tempints[1] >= 51) && (tempints[1] <= 62))
  	return (1);
  else
	return(-1);
}

int main()
{
  char line[LINELENGTH];
  int * ints;
  int intslength;
  int i;
  int x;

  while(!feof(stdin))
  {

	fgets(line,LINELENGTH,stdin);
	switch (str2ints(line,&ints,&intslength))
	{
	 case -2 : 
		return(0);
		break; 
	 case 0 : 
		printf("boy\n");
		break;
	 case 1 : 
		printf("girl\n");
		break;
	 default :
		printf("invalid\n");
		break;
	}
  }

  return (0);
}