#include <iostream>
#include <iomanip>
 #include <stdlib.h>
#include <cstring>


using namespace std;

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

	string a;
	int rok = 0, mesic = 0, den=0, k = 0;//, konec = 0; 
	while (1) {
		
		cin >> a;
		if ( a == "end" ) break;
		if (a.length() < 10){
			cout << "invalid" << endl;
		} else if (a[6] != '/'){
			cout << "invalid" << endl;				 
		}else {
			char b[2];
			b[0] = a[0] ;
			b[1] = a[1] ;
			
			rok = atoi(b);
			
			b[0] = a[2] ;
			b[1] = a[3] ;			

			mesic = atoi(b);

			b[0] = a[4] ;
			b[1] = a[5] ;			

			den = atoi(b);
			
			if  (rok > 9 && rok < 20){
				cout << "invalid" << endl;
			} else if (rok > 9 && rok <= 53 && a.length() > 10){
				cout << "invalid" << endl;
			} else if ((rok % 4 != 0 && rok != 0 ) && (mesic == 2 || mesic == 52) && den > 28){ 
				cout << "invalid" << endl;
			} else if (a[10] == '\0'){
				char pom[3];				
					pom[0] = a[8] ;
					pom[1] = a[9] ;				
					pom[2] = '\0';
				k = atoi(pom);
//cout << "k " << k << endl;
					pom[0] = a[5] ;
					pom[1] = a[7] ;				
					pom[2] = '\0';
				k += atoi(pom);
//cout << "k " << k << endl;
					pom[0] = a[3] ;
					pom[1] = a[4] ;				
					pom[2] = '\0';
				k += atoi(pom);
//cout << "k " << k << endl;
					pom[0] = a[1] ;
					pom[1] = a[2] ;				
					pom[2] = '\0';
				k += atoi(pom);
//cout << "k " << k << endl;
					pom[0] = '0' ;
					pom[1] = a[0] ;				
					pom[2] = '\0';
				k += atoi(pom);
				//cout << "k " << k << " mod " << (k % 11) << endl;
				//char pom[3];
				pom[0] = a[7] ;
				pom[1] = a[8] ;				
				pom[2] = '\0';
				int l = atoi(pom);
				char pom2[3];
				pom2[0] = a[9] ;
				pom2[1] = a[10];
				pom2[2] = '\0';
				int d = atoi(pom2);
				//cout << "l " << l << " d " << d << " soucet " << (den + mesic + rok + l + d) << endl;
				if ( (((den + mesic + rok + l + d) % 11) != 0) && ( ((k - 1) % 11) != 0 )){
					cout << "invalid" << endl;
				} else if (mesic < 13){
					cout << "boy" << endl;
				} else cout << "girl" << endl;
				/*if ( ((k - 1) % 11) != 0 ){
					cout << "invalid1" << endl;
				} else if (mesic < 13){
					cout << "boy" << endl;
				} else cout << "girl" << endl;*/
			} else {
				char pom[3];
				pom[0] = a[7] ;
				pom[1] = a[8] ;				
				pom[2] = '\0';
				int k = atoi(pom);
				char pom2[3];
				pom2[0] = a[9] ;
				pom2[1] = a[10];
				pom2[2] = '\0';
				int d = atoi(pom2);
				//cout << "k " << k << " d " << d << " soucet " << (den + mesic + rok + k + d) << endl;
				if ( ((den + mesic + rok + k + d) % 11) != 0 ){
					cout << "invalid" << endl;
				} else if (mesic < 13){
					cout << "boy" << endl;
				} else cout << "girl" << endl;
				
			}
			//cout << "mudulo " << ((int)a % 11) << endl;
			
			//cout << rok << ", " << mesic << ", " << den << endl;
		}

	}
	//while (a[0] != 'e' && a[1] != 'n' && a[2] != 'n');
	

		
	
	return 0;
}