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

char input[40];
char cislo[40];

char temp[2];
int year;
int month;
int day; 
int girl;
int correct;

int years[23] = {2008, 2004, 2000, 1996, 1992, 1988, 1984, 1980, 1976, 1972, 1968, 1964, 1960, 1956, 1952, 1948, 1944, 1940, 1936, 1932, 1928, 1924, 1920};



int main(void)
{
	while(1)
	{
		scanf("%s\n", &input);

		if (strcmp(input, "end") == 0)
		{
			return 0;
		}
		else
		{
			int len = strlen(input);
			correct = 1;
			year = day = month = girl = 0;

			if (len == 10 || len == 11)
			{
				for (int i = 0; i < len; i++)
				{
					if (input[i] == '/' and i != 6)
						correct = 0;
				}

				if (correct && input[0] == '1')
					correct = 0;

				if (correct)
				{
					strncpy(cislo, input, 6);
					strncpy(cislo+6, input+7, 4);
					long long number = atoll(cislo);

					strncpy(temp, input, 2);
					year = atoi(temp);
					strncpy(temp, input+2, 2);
					month = atoi(temp);
					strncpy(temp, input+4, 2);
					day = atoi(temp);

					if (year >= 20)
						year = 1900 + year;
					else if (year <= 9)
						year = 2000 + year;
					else
						correct = 0;

					if (month > 50)
					{
						girl = 1;
						month = month - 50;
					}

					if (month > 12 || month < 0)
						correct = 0;

					if (day > 31)
						correct = 0;

					if (len == 11 )
					{
						if (year <= 1953)
							correct = 0;

						if (number % 11 != 0)
						{
							correct = 0;
						}
					}
					else
					{
						if (year > 1953)
							correct = false;
					}

					if (correct)
					{
						switch(month)
						{

							case 1:
							case 3:
							case 5:
							case 7:
							case 8:
							case 10:
							case 12:
								if (day>31)
									correct = 0;

								break;

							case 4:
							case 6:
							case 9:
							case 11:
								if (day > 30)
									correct = 0;
								break;

							case 2:
								if (day >= 29)
								{

									if (day == 29)
									{
										int found = 0;
										for (int i = 0; i < 23; i++)
										{
											if (years[i] == year)
												found = 1;
										}

										if (!found)
											correct = 0;
									}
									else
										correct = false;
								}
								break;
						}
							
					}

					
				}
			}
			else
			{
				correct = 0;
			}

/*			printf("%s: ", input);

			printf("%d %d %d ", year, month, day);
*/
			if (!correct )
			{
				printf("invalid\n");
			}
			else
			{
				if (girl)
					printf("girl\n");
				else
					printf("boy\n");
			}
		}
	}
}