#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <cctype>

#include <iostream>
#include <sstream>
#include <string>

#include <vector>
#include <list>
#include <queue>
#include <set>
#include <map>
#include <stack>
#include <algorithm>
using namespace std;

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define FOR2(i,a,b) for (int i = (a); i > (b); ++i)
/*
#define FOR(i,n) for(int i=0; i < (n); i++)
#define FORD(i,n) for(int i=(n)-1; i >= 0; i--)
#define FORTO(i,a,b) for (int i = (a); i <= (b); ++i)
*/


#define DEBUG(x) cout << '>' << #x << ' ' << x << endl;
#define SIZE(x) int(x.size())

typedef pair<int, int> PII;
typedef long long ll;

char input[47];
int len;

const int days[] = {31,28,31,30,31,30,31,31,30,31,30,31};

int leap(int year)
{
	if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
		return 1;
	return 0;
}

int ds(int month, int year)
{
	if (month != 2)
		return days[month-1];
	return days[month-1]+leap(year);
}

bool check(bool & girl)
{
	//najde slash
	int sl = -1;
	FOR(i, 0, len)
		if (input[i] == '/')
		{
			if (sl == -1) sl = i;
			else return false;
		}
	if (sl != 6) return false;
	
	int year = (input[0]-'0')*10 + input[1]-'0', month = (input[2]-'0')*10 + input[3]-'0',
		     day = (input[4]-'0')*10 + input[5]-'0';
	//nastavi rok
	if (year >= 20) year += 1900;
	else if (year <= 9) year += 2000;
	else return false;
	
	if (month >= 50)
	{
		girl = true;
		month -= 50;
	}
	else girl = false;
	
	if (month < 1 || month > 12 || day < 1) return false;
	if (ds(month, year) < day) return false;
	
	//3 cisla za
	if (year <= 1953 && len-sl-1 != 3) return false;
	//4 cisla za
	if (year >= 1954 && len-sl-1 != 4) return false;
	
	//cekne delitelnost
	ll n = 0;
	FOR(i, 0, len)
		if (isdigit(input[i]))
			n = n*10 + input[i]-'0';
	if (len == 10) return true;
	return (n % 11 == 0);
}

int main()
{
	while (1)
	{
		gets(input);
		if (input[0] == 'e') break;
		len = strlen(input);
		
		bool girl;
		if (!check(girl))
			printf("invalid\n");
		else 
		{
			if (girl) printf("girl\n");
			else printf("boy\n");
		}
	}
	
	return 0;
}