#include <stdio.h>
#include <string.h>
#include <math.h>

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

void copy(char *c, char *d, int ind)
{
	int i;
	for (i = 0; i < 2; i++)
		d[i] = c[ind + i];
	d[i] = 0;
}

int main()
{
	char c[25];
	char d[3];
	long long num;
	int i, j, ok, y, k, len, m;

	while (1)
	{
		fgets(c, 23, stdin);
		c[strlen(c)-1] = 0;
		if (c[0] == 'e' && c[1] == 'n' && c[2] == 'd')
			break;
		ok = 0;
		len = strlen(c);
		if ((c[6] == '/') && (len >= 10 && len <= 11)) /* lomitko*/
		{
			for (i = 6; i < 11; i++)
				c[i] = c[i+1];
			len = strlen(c);
			ok = 1;
			for (i = 0; i < len; i++)
				ok &= c[i] >= '0' && c[i] <= '9';
			if (ok)
			{
				ok = 0;
				num = atol(c + 1);
				num = (c[0] - '0') * pow(10, len - 1) + num;
				copy(c, d, 0);
				y = atoi(d);
				if (y < 10 || y >= 20)	 /* rok*/
				{
					copy(c, d, 2);
					m = atoi(d);
					if ((m > 0 && m < 13) || (m > 50 && m < 63))	/* mesiac*/
					{
						copy(c, d, 4);
						k = atoi(d);
						if (k > 0 && k <= 31)		/* den*/
						{
							/*printf("%d %d\n", y, len);*/
							if ((y > 10 && y <= 53 && len == 9) || ((y > 53 || y < 10) && len == 10))
							{
								/*printf("%lld", num);*/
								if (len == 9 || (num % 11 == 0))
								{
									ok = k <= days[m > 50 ? (m - 51) : (m - 1)];
									if (y % 4 == 0 && m == 2 && k == 29)
										ok = 1;
								}
							}
						}
					}
				}
			}
		}

		if (ok && m > 50)
			printf("girl\n");
		else if (ok)
			printf("boy\n");
		else
			printf("invalid\n");
	}

	return 0;
}