#include <iostream>
#include <sstream>
#include <vector>
#include <cmath>
#include <set>
#include <map>

using namespace std;

bool priest(int year) 
{	
	if (year < 10) 	year += 2000;
	else 			year += 1900;
	
	return ((year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0)));
}

int main() {

	int mon1[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
	int mon2[] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
	
	
	while (1) {
	int b, e;
	string ch2;
	getline(cin, ch2);
	
	if (sscanf(ch2.c_str(), "%d/%d", &b, &e) == 2) {
		int g = 0;
		for (int i=0; i<ch2.size(); i++) {
			if (ch2[i] == '/') g++;
		}
		bool in = false;
		int y, m, d;
		y = b / 10000;
		m = b / 100 % 100;
		d = b % 100;
		
		if (g>1) in = true;
		else {
			int sest, tri;
			sest = ch2.find('/');
			tri = ch2.size() - (sest+1);
			//printf("%d %d\n",sest, tri);
			if (sest != 6) in = true;
			if (y >= 20 && y <= 53) {
				if (tri == 4) in = true;
			} else if (tri == 3) in = true;
		}
		
		bool debug = 0;
		if (debug) printf ("%d %d %d - %d, %d\n", y,m,d,b,e);
		
		bool girl = m > 50;
		if (girl) m-=50;
		
		if (debug) printf ("%d\n", in);
		if (y < 20 && y > 9) in = true;
		if (debug) printf ("%d\n", in);
		if (m == 0 || m > 12) in = true;
		if (debug) printf ("%d\n", in);
		if (d == 0 || d > 31) in = true;
		
		if (debug) printf ("%d\n", in);
		if (!in && priest(y) && d > mon2[m-1]) in = true;
		if (debug) printf ("priest =%d %d\n",priest(y), in);
		if (!in && !priest(y) && d > mon1[m-1]) in = true;
		
		if (debug) printf ("%d\n", in);
		long long int all = b;
		all *= 10000;
		all += e;
		if (all % 11) in = true;
		
		if (debug) printf ("%d %lld\n", in, all);
		
		if (in) printf("invalid\n");
		else if (girl) {
			printf ("girl\n");
			} else printf("boy\n");
	} else {
		if (ch2[0]=='e') return 0;
		printf ("invalid\n");
	}

}
	
	return 0;
}