#include <cstdio>
#include <cstdlib>
#include <iostream>
using namespace std;

int days[] = {31, 30, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int scanN1() {
	int n = 0;
	for(int i = 0; i < 6; i++) {
		char c;
		scanf("%c", &c);
		//printf("c%c;", c);
		
		if(c == '/' || c == '\n') return -1;
		if(c == 'e') return -2;
		
		n = n * 10 + c - 48;
		
	}
	
	return n;
}

int scanN2(int d) {
	int n = 0;
	for(int i = 0; i < d; i++) {
		char c;
		scanf("%c", &c);
		if(c == '/') {
			while(c != '\n') scanf("%c", &c);
			return -1;
		}
		else if(c == '\n') return -1;
		n = n * 10 + c - 48;
		
	}
	
	char c;
	scanf("%c", &c);
	if(c != '\n'){
		while(c != '\n') scanf("%c", &c);
		return -1;
	}
	
	return n;
}

int main(){
	
	while(1){
		
		char c;
		int n1 = scanN1();
		if(n1 == -1) {
			scanf("%c", &c);
			//printf("*%c* ", c);
			while(c != '\n'){scanf("%c", &c);}
			printf("invalid\n");
			continue;
		} else if (n1 == -2) break;
		
		
		scanf("%c", &c);
		if(c != '/') {
			printf("invalid\n");
			scanf("%c", &c);
			while(c != '\n') scanf("%c", &c);
			continue;
		}
		
		int y = n1 / 10000;
		int m = (n1 % 10000) / 100;
		int d = (n1 - y * 10000 - m * 100);
		
		int ln = 3;
		if(y > 53 || y < 9) ln = 4;
		
		int n2 = scanN2(ln);
		if(n2 == -1) {
			printf("invalid\n");
			continue;
		}

		
		int male = 1;
		if(m > 50){ m -= 50; male = 0;}
		if(m < 1 || m > 12) {
			printf("invalid\n");
			continue;
		}
		
		if(m != 1 && (d < 1 || d > days[m - 1])) {
			printf("invalid\n");
			continue;
		} else if (m == 2 && y % 4 != 0 && (d < 1 || d > 28  )) {
			printf("invalid\n");
			continue;
		} else if (m == 2 && y % 4 == 0 && (d < 1 || d > 29)) {
			printf("invalid\n");
			continue;
		}
		
		
		int zb = n1 % 11;
		zb = zb * 10000 + n2;
		zb = zb % 11;
		if(zb != 0) {
			printf("invalid\n");
			continue;
		}
		
		if(male) printf("boy\n");
		else printf("girl\n");
	}	

			
								
	return 0;
}