#include <stdio.h>

int main(int argc, char * argv[])
{
char cisla[20];

int mesice[12]={31,28,31,30,31,30,31,31,30,31,30,31};
int g=0;
int ok=1;
while(1){
int i=0;
	for (i=0;i<20;i++){
		cisla[i] = getc(stdin);
		if (cisla[i]=='\n') {
			if (( i>11) || (i<10)){
			printf("invalid\n");
			ok=0;
			break;
			}
		ok=1;
		break;
		}
	if ((cisla[0]=='e') && (cisla[1]=='n') && (cisla[2]=='d') ) {
	//printf("end\n");
	return 0;}

	if (cisla[i]=='/') {
			if ( i!=6) {
			printf("invalid\n");
			ok=0;
			while(getc(stdin)!='\n');
			//break;
			}
		ok=1;
		//break;
		}
	}
	if (!ok) continue;
	else {
	int r = ((cisla[0]-'0') * 10 )+(cisla[1]-'0') ;
	int m = ((cisla[2]-'0') * 10 )+(cisla[3]-'0') ;
	int d = ((cisla[4]-'0') * 10 )+(cisla[5]-'0') ;
	
	if ((r>=20)&&(r<=53)&&(i==11)) {
			printf("invalid\n");
			ok=0;
			continue;
			} 
	

	if (((r>53)||(r<=9))&&(i<11)) {
			printf("invalid\n");
			ok=0;
			continue;
			} 
	
	
	if (((m >= 1)&& (m<=12))||((m >= 51)&& (m<=62))){
	//platne mesice
	int rr;	
	mesice[1]=28;
	if (r<20) rr=r+2000; else rr=r+1900;
	if ((rr%4==0)&& !(rr%100==0)) {
	mesice[1]=29;
	} else if (rr%400==0) {mesice[1]=29;}
	
	
	g=0;
	if (m>50) {m-=50;
	g=1;
	}
	
		if ((d > mesice[m-1])||(d==0)){
			printf("invalid\n");
			ok=0;
			continue;
		}
	

	int rod=0;
	if ((r>9)&&(r<20)){
		printf("invalid\n");
		ok=0;
		continue;
		}

	if ((r>20)&&(r<54)){
	if(g) printf("girl\n");  else printf("boy\n");
	continue;
/*
		rod=((cisla[0]-cisla[1]+cisla[2]-cisla[3]+cisla[4]-cisla[5]+cisla[7]-cisla[8]+cisla[9]))-'0';
		printf("%d- ",rod);
		if (rod%11==0){
			printf("%d- ",rod);
			if(g) printf("girl\n");  else printf("boy\n");
		}else {
			printf("invalid\n");
			ok=0;
			continue;
		}	
*/	}else{	
	
	
		rod=((cisla[0]-cisla[1]+cisla[2]-cisla[3]+cisla[4]-cisla[5]+cisla[7]-cisla[8]+cisla[9]-cisla[10]));
		//printf("%d- ",rod);
		if (rod%11==0){
			//printf("%d- ",rod);
			if(g) printf("girl\n");  else printf("boy\n");
			continue;
		}else {
			printf("invalid\n");
			ok=0;
			continue;
		}	

	}
	}else{ // spatne mesice
		printf("invalid\n");
		ok=0;
		continue;
	}	
	
	}
	
	//for (int i=0;i<12;i++){printf("%c ",cisla[i]);}
	

}
return 0;
}