#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

bool boy;

int decodenum(const char *c)
{
	return ((c[0] - '0' ) * 10 + c[1] - '0');
}

bool control(int r, int m, int d)
{
	//printf(" (r=%d %d %d) ", r, m, d);
	int unor = 28;
	if (r % 4 == 0) unor = 29;
	if (d == 0) return false;
	if (!boy) m-= 50;
	switch(m)
{
	case 1: return (d <= 31);
	case 2: return (d <= unor);
	case 3: return (d <= 31);
	case 4: return (d <= 30);
	case 5: return (d <= 31);
	case 6: return (d <= 30);
	case 7: return (d <= 31);
	case 8: return (d <= 31);
	case 9: return (d <= 30);
	case 10: return (d <= 31);
	case 11: return (d <= 30);
	case 12: return (d <= 31);
}
	return false;
}

bool modulo(const char *c)
{
	unsigned long long a = 0;
	for (int i = 0; i < 11; i++)
	{
		if (isdigit(c[i]))
		{
			a *= 10;
			a += c[i] - '0';
		}
	}
	return (a % 11) == 0;
}


bool first(const char *c)
{
	//printf("delka ");
	if (strlen(c) < 10) return false;
	if (strlen(c) > 11) return false;
	//printf("cifry ");
	for (int i = 0; i < 6; i++) if (!isdigit(c[i])) return false;
	//printf("lom ");
	if (c[6] != '/') return false;
	//printf("cif ");
	for (int i = 7; i < strlen(c); i++) if (!isdigit(c[i])) return false;
	
	//printf("rok ");
	int r = decodenum(c);
	if (r < 20 && r > 9) return false;
	if (r >= 20 && r < 54 && strlen(c) > 10) return false;
	if ((r >= 54 || r <= 9) && strlen(c) < 11) return false;

	//printf("m ");
	int m = decodenum(c + 2);

	if (m > 50)
	{
		if (m > 62) return false;
		boy = false;
	} else
	{
		if (m == 0 || m > 12) return false;
		boy = true;
	}

	//printf("d ");
	int d = decodenum(c + 4);
	if (!control(r, m, d)) return false;

	//printf("sum ");
	if (strlen(c) == 11 && !modulo(c)) return false;
	return true;
}


int main()
{
	char line[100];

	gets(line);
	if (line[strlen(line)-1] == '\n') line[strlen(line)-1] = 0;

	while (strcmp(line, "end") != 0)
	{
		if (first(line))
		{
			if (boy) printf("boy\n"); else printf("girl\n");
		} else
		{
			printf("invalid\n");
		}
		gets(line);
		if (line[strlen(line)-1] == '\n') line[strlen(line)-1] = 0;	
	}

}