#include <iostream>
#include <string>
using namespace std;

void vypis(string a);
unsigned int chtoi(char cislo);
string a;

typedef struct Datum {
short rok;
short mesic;
short den;
bool zena;
} Datum;

int main() {

	getline(cin,a);
	while(a!="end") {
		vypis(a);
		getline(cin,a);
	}
return 0;
}

unsigned int chtoi(char cislo) {
switch( cislo ) {
	case '0': return 0; break;
	case '1': return 1; break;
	case '2': return 2; break;
	case '3': return 3; break;	
	case '4': return 4; break;
	case '5': return 5; break;
	case '6': return 6; break;
	case '7': return 7; break;
	case '8': return 8; break;
	case '9': return 9; break;
   }
return 10;
}

void vypis(string a){
Datum date;
long long int rc = 0;
if(a.length() < 10) { cout << "invalid" << endl; return; }
for(unsigned int i = 0; i < a.length(); i++) {
if(i==6 && a[i] == '/') { continue; }
rc *= 10;
if(i==6 && a[i] != '/') { cout << "invalid" << endl; return; }
if(i!=6 && a[i] == '/') { cout << "invalid" << endl; return; }
if(i>10) { cout << "invalid" << endl; return; }
rc += chtoi(a[i]);
}
date.rok=chtoi(a[0])*10+chtoi(a[1]);
date.mesic=chtoi(a[2])*10+chtoi(a[3]);
date.den=chtoi(a[4])*10+chtoi(a[5]);
date.zena = false;
if(date.mesic>12) { date.zena = true; date.mesic -= 50; }
if(date.rok > 9 && date.rok < 20) { cout << "invalid" << endl; return; }
if((date.rok < 54 && date.rok > 9) && a.length() > 10) { cout << "invalid" << endl; return; }
if((date.rok > 53 || date.rok < 10) && a.length() < 11) { cout << "invalid" << endl; return; }
if(date.mesic>12 || date.mesic < 1) { cout << "invalid" << endl; return; }
if(date.den>31 || date.den < 1) { cout << "invalid" << endl; return; }
switch( date.mesic ) {
	case 1:
	case 3:
	case 5: 
	case 7: 
	case 8: 
	case 10: 
	case 12:
	break;
	case 2: 
		if((date.rok % 4 == 0)) { if(date.den>29) { cout << "invalid" << endl; return; }  }
		else { if(date.den>28) { cout << "invalid" << endl; return; }  }
 	break;
	default: 
		if(date.den>30) { cout << "invalid" << endl; return; }
 	break;
   }
if((a.length()==11) && (rc%11!=0) && (date.rok > 53 || date.rok < 10)) { cout << "invalid" << endl; return; }

if(date.zena) cout << "girl" << endl;
else cout << "boy" << endl;


}