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


int main(){
/*definice konstant*/

long wholenumber;
unsigned int wholenumber_d;
int part2;
int year;
int month;
int day;
int lenpart1, lenpart2;
int boy;
double help;

char* ukazatel;
char* pom = malloc(21*sizeof(char));
char* part1_s = malloc(20*sizeof(char));
char* part2_s = malloc(20*sizeof(char));

int DAYS []= {0,31,28,31,30,31,30,31,31,30,31,30,31};
int DAYS_P [] = {0,31,29,31,30,31,30,31,31,30,31,30,31};

do{
scanf("%s\n",pom);

part2_s = strchr(pom,'/');

if(strlen(pom)>0 && pom[0]=='e') break;/*jakmile narazi na end */

if(part2_s == NULL){
	printf("invalid\n");
	continue;
}
*part2_s = 0;
part2_s = part2_s + 1;
part1_s = pom;



if(strchr(part1_s,'/')!=NULL || strchr(part2_s,'/')!=NULL){
	printf("invalid\n");
	continue;
}

boy = 1;

lenpart1 = strlen(part1_s);
lenpart2 = strlen(part2_s);


if(lenpart1!=6){
	printf("invalid\n");
	continue;
}
if(lenpart2 < 3 || lenpart2 > 4){
	printf("invalid\n");
	continue;	month = month - 50;
	
}
sscanf(part1_s,"%u",&wholenumber_d);

sscanf(part1_s,"%d.2%d.2%d.2",&year,&month,&day);
 ukazatel = part1_s+4; /* presun na posledni dvojici */
sscanf(ukazatel,"%d",&day);
*ukazatel =0;
ukazatel= part1_s+2;
sscanf(ukazatel,"%d",&month);
*ukazatel =0;
ukazatel=part1_s;
sscanf(ukazatel,"%d",&year);


/*printf("%d  %d  %d",year,month,day);*/

if((lenpart2 == 3 && year >= 20 && year <= 53) || (year <= 9 && lenpart2 == 4) || (year >= 54 && lenpart2 == 4)){
	if(month > 12){
		month = month - 50;
		boy = 0;
	}
	if(month >= 1 && month <= 12){
		
		wholenumber = (long)wholenumber_d;
		help=wholenumber_d;
		sscanf(part2_s,"%d",&part2);
	
		
			help= help*10000+part2;
/*printf("  g%f ",help);
printf("  %li  |",wholenumber);
			wholenumber = wholenumber * 10000;
printf("  %li  ",wholenumber);
			wholenumber+=part2;
printf("  %li  ",wholenumber);*/
		
	 	
		if( fmod(help,11)!=0 ){
			printf("invalid\n");
			continue;
		}
		
		if(year <= 9)year = year + 2000;
		else{
			year = year + 1900;
		}

		if(year % 4 == 0){
			if(day <= DAYS_P[month]){
				if(boy == 1){
					printf("boy\n");
					continue;
				}
				else{
					printf("girl\n");
					continue;
				}
			}
			else{
				printf("invalid\n");
				continue;
			}
		}
		else{
			if(day <= DAYS[month]){
				if(boy == 1){
					printf("boy\n");
					continue;
				}
				else{
					printf("girl\n");
					continue;
				}
			}
			else{
				printf("invalid\n");
				continue;
			}
		}
	}
	else{
		printf("invalid\n");
		continue;
	}
}
else{
	printf("invalid\n");
	continue;
}


}while(1);

free(part1_s);
free(part2_s);


return 0; /* ok kod*/
}