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

char in[50];
int len;

void loop() {
	int count = 0;
	for(int i = 0; i < len; i++) {
		if(in[i] == '/')
			count++;
	}
	if(count != 1 || in[6] != '/') {
		printf("invalid\n");
		return;
	}
	in[6] = '\0';
	char* second = in+7;
	int year = in[1]-'0' + (in[0]-'0')*10;
	int month = in[3]-'0' + (in[2]-'0')*10;
	int day = in[5]-'0' + (in[4]-'0')*10;
	bool woman;
	if(month >= 50) {
		woman = true;
		month -= 50;
	} else {
		woman = false;
	}
	if(month < 1 || month > 12) {
		printf("invalid\n");
		return;
	}

	if(year > 9 && year < 20) {
		printf("invalid\n");
		return;
	}
	
	if(year <= 9)
		year += 2000;
	else
		year += 1900;

	switch(month) {
		case(1):
		case(3):
		case(5):
		case(7):
		case(8):
		case(10):
		case(12):
			if(day > 31 || day < 1) {
				printf("invalid\n");
				return;
			}
			break;
		case(4):
		case(6):
		case(9):
		case(11):
			if(day > 30 || day < 1) {
				printf("invalid\n");
				return;
			}
			break;
		case(2):
			if((year%4==0 && year%100!=0) || year%400==0) {
				if(day > 29 || day < 1) {
					printf("invalid\n");
					return;
				}				
			} else {
				if(day > 28 || day < 1) {
					printf("invalid\n");
					return;
				}
			}
			break;
		default: {
				printf("invalid\n");
				return;
			}
		
	}

	if(strlen(second) == 3 && year <= 1953) {
		
	} else if(strlen(second) == 4 && year > 1953) {
		long long sum = atoi(in);
		sum *=  10000;
		sum += atoi(second);
		if(sum % 11 != 0) {
			printf("invalid\n");
			return;
		}
		
	} else {
		printf("invalid\n");
		return;
	}

	if(woman)
		printf("girl\n");
	else
		printf("boy\n");

}

int main() {
	while(true) {
		gets(in);
		if(strcmp(in, "end") == 0)
			return 0;
		len = strlen(in);
		loop();		
	}
	return 0;
}