#include <cstdio>
#include <cstring>
#include <cctype>
#include <cstdlib>

const int girlIdent = 50;

int year;
int month;
int day;
int suffix;
unsigned long long all;

void check(char* num);

int main(void){
	char c;
	int i = 0;
	char pid[21]; //personal id

	memset(pid, '\0', sizeof(pid));

	while((c = getchar()) != EOF){
		if(c != '\n'){
			pid[i++] = c;
		} else {
			i = 0;
			check(pid);
			memset(pid, '\0', sizeof(pid));
			all = 0;
			year = 0;
			month = 0;
			day = 0;
			suffix = 0;
		}
	}

	return 0;
}

void check(char* num){
	char tmp[30];
	
	if(strcmp(num, "end") == 0){
		exit(0);
	}
	
	for(int i = 0; i <= 5; i++){
		if(!isdigit(num[i])){
			printf("invalid\n");
			return;		
		}
	}
	
	year = 	(num[0] - '0') * 10 + (num[1] - '0');
	month = (num[2] - '0') * 10 + (num[3] - '0');
	day = 	(num[4] - '0') * 10 + (num[5] - '0');
	
	if(!(((month >= 1) && (month <= 12)) ||
	((month >= 51) && (month <= 62)))){
		printf("invalid\n");
		return;		
	}
	
	if((day < 1) || (day > 31)){
		printf("invalid\n");
		return;		
	} else {
		switch (month) {
			case 1:
			case 51:
			case 3:
			case 53:
			case 5:
			case 55:
			case 7:
			case 57:
			case 8:
			case 58:
			case 10:
			case 60:
			case 12:
			case 62:
				break;
			case 2:
			case 52:
/*				if (!(day == 28 || day == 29)) {
					printf("invalid\n");
					return;
				}*/
				if (day == 29) {
					if (!(
					((year%4==0)&&(year%100!=0)) ||
					((year%400)==0)
					))
					{
						printf("invalid\n");
						return;
					}
				} else if (day > 29){
						printf("invalid\n");
						return;
				}
				break;
			default:
				if (day != 30) {
					printf("invalid\n");
					return;
				}
		}
	}
	
	if(num[6] != '/'){
		printf("invalid\n");
		return;		
	}
	
	if(!isdigit(num[7])){
		printf("invalid\n");
		return;
	}
	
	if(!isdigit(num[8])){
		printf("invalid\n");
		return;
	}
	
	if(!isdigit(num[9])){
		printf("invalid\n");
		return;
	}
	
	memset(tmp, '\0', sizeof(tmp));
	if(num[10] == '\0'){
		suffix += (num[7] - '0') * 100;
		suffix += (num[8] - '0') * 10;
		suffix += (num[9] - '0');
				
		/*all += suffix;
		all += day *   1000;
		all += month * 100000;
		all += year *  10000000;*/
		

		sprintf(tmp, "%02d%02d%02d%04d", year, month, day, suffix);

		if (year >= 1954) {
			printf("invalid\n");
			return;
		}		

		all = (unsigned long long)atof(tmp);
	
		if((all % 11) != 0){
			printf("invalid\n");
			return;
		}
		
	} else {
		suffix += (num[7] - '0') * 1000;
		suffix += (num[8] - '0') * 100;
		suffix += (num[9] - '0') * 10;	
		suffix += (num[10] - '0');	


		/*all += suffix;
		all += day *   10000;
		all += month * 1000000;
		all += year *  100000000;*/
		sprintf(tmp, "%02d%02d%02d%04d", year, month, day, suffix);
		

		if (year < 54 && year > 9) {
			printf("invalid\n");
			return;
		}
		
		all = (unsigned long long)atof(tmp);
	
		if((all % 11) != 0){
			printf("invalid\n");
			return;
		}
	}
	
	if ( year < 20 && year > 9 ) {
		printf("invalid\n");
		return;
	}
	
	if (month > 50) {
		printf("girl\n");
		return;
	} else {
		printf("boy\n");
		return;
	}
	
		
//	printf("%d\n", all);

//	printf("%d%d%d/%d\n%d\n\n",year, month, day, suffix, all);

//	printf("%s\n%f.0\n\n", tmp, );
	

	//printf("** %s\n", num);
}