#include <iostream>
#include <iomanip>
#include <sstream>
#include <string>
#include <stdlib.h>


using namespace std;


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

while (!cin.eof()) {
getline (cin, line, '\n');
if (line.compare("end") == 0) return 0;
//cout << line << endl;
if (line.size() < 11 && line.size() > 13) {
cout << "invalid" << endl;
continue;
}
if (line.size() >= 11 && line.size() <=13) {
//cout << line << endl;

int loc;
loc = line.find ("/",0);


string num;
if (loc != string::npos )
{
num = line.substr(loc+1);
}
int YY, MM, DD;
 
YY = atoi(line.substr(0,2).c_str());
MM = atoi(line.substr(2,2).c_str());
DD = atoi(line.substr(4,2).c_str());


// cout << YY << "." << MM << "." << DD << endl;

string result = "";

if ((YY % 4) == 0 && ( MM == 2 || MM == 52) && (DD > 29) )
{
cout << "invalid" << endl;
continue;
}

if ((YY % 4) != 0 && ( MM == 2 || MM == 52) && (DD > 28) )
{
cout << "invalid" << endl;
continue;

}


if ((MM == 1 || MM == 3 || MM == 5 || MM == 7 || MM == 8 || MM == 10 || MM == 12  ) && DD > 31)
{
cout << "invalid" << endl;
continue;

}

if ((MM == 4 || MM == 6 || MM == 9 || MM == 11 ) && DD > 30)
{
cout << "invalid" << endl;
continue;

}



if (YY > 9 && YY < 20) {
cout << "invalid" << endl;
continue;
}

if (DD < 1 && DD > 31) {
cout << "invalid" << endl;
continue;
}

if (MM > 1 && MM < 13) {
result.append("boy");
} else if (MM > 50 && MM < 63) {
result.append("girl");
}
else {
cout << "invalid" << endl;
continue;
}

string nummer = "";  
//cout << "prefix: " << line.substr(0,6) << endl;
nummer.append(line.substr(0,6));
//cout << "postfix: " << num << endl;
nummer.append(num);
//cout << "-" << nummer << "-" << endl;

long long nummer2 = atoll(nummer.c_str());




//cout << "modulo:" << nummer2 % 11 << endl;

if ((YY == 0 || YY == 1 || YY == 2 || YY == 3 || YY == 4 || YY == 5 || YY == 6 || YY == 7 || YY == 8 || YY == 9) && num.size() == 4)
{
if (num.size() == 4 )
{
	if((nummer2 % 11) == 0) { 
		cout << result << endl;
		continue;
	} else {
	cout << "invalid" << endl;
	continue;
}

}
}
else if ((YY < 54 && num.size() == 4) || (YY > 53 && num.size() == 3 ))
{
	cout << "invalid" << endl;
	continue;

}

if (num.size() == 4 )
{
	if((nummer2 % 11) == 0) { 
		cout << result << endl;
		continue;
	} else {
	cout << "invalid" << endl;
	continue;
}	

}
else 
{
cout << result << endl;
continue;
}
}
}
return 0;
}