#include <string>
#include <cstdio>
#include <cstring>

using namespace std;

int days[] = { 31, -1, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

int month_day(int mon, int yr){
	//printf("%d, %d\n", mon, yr);

	if(mon == 2){
		if(yr % 400 == 0)
			return 29;
		else if(yr % 100 == 0)
			return 28;
		else if(yr % 4 == 0)
			return 29;
		else
			return 28;
	}
	else
		return days[mon - 1];
}

bool isGirl(int &mon){
	if(mon > 50){
		mon -= 50;
		return true;
	}
	else
		return false;
}

int main(int argc, char **argv){
	char buffer[20];
	string input;

	int day, mon, yr, len_p, len_s, i;
	uint64_t sum;
	int prefix, suffix;

	bool girl;

	scanf("%s", buffer);
	input = string(buffer);

	while(input != "end"){
		sum = day = mon = yr = prefix = suffix = len_p = len_s = i = 0;

		//printf("%s\n\n", input.c_str());

		while(i < input.size() && input[i] != '/'){
			prefix = prefix * 10 + input[i] - '0';
			sum = sum * 10 + input[i] - '0';
			i++;
		}

		//printf("%d\n\n", prefix);

		len_p = i + 1;

		if(i != 6 || i >= input.size()){
			printf("invalid\n");
			goto read;
		}

		if(i++ >= input.size()){
			printf("invalid\n");
			goto read;
		}

		for(; i < input.size(); ++i){
			if(!isdigit(input[i])){
				printf("invalid\n");
				goto read;
			}
			//printf("%c\n\n", input[i]);

			suffix = suffix * 10 + input[i] - '0';
			sum = sum * 10 + input[i] - '0';

			len_s++;
		}

		//printf("%d\n\n", suffix);
		//printf("%d\n", sum);

		if(len_s != 3 && len_s != 4){
			printf("invalid\n");
			goto read;
		}

		if((len_s > 3) && (sum % 11 != 0)){
			printf("invalid\n");
			goto read;
		}

		day = prefix % 100;
		mon = (prefix / 100) % 100;
		yr = (prefix / 10000) % 100;

		if(!((yr >= 20 && yr <= 99) || (yr >= 0 && yr <= 9))){
			printf("invalid\n");
			goto read;
		}

		yr += (yr >= 20 && yr <= 99) ? 1900 : 2000;

		//printf("%d, %d\n", yr, len_s);

		if((yr <= 1953) && (len_s != 3)){
			printf("invalid\n");
			goto read;
		}
		else if((yr >= 1954) && (len_s != 4)){
			printf("invalid\n");
			goto read;
		}

		girl = isGirl(mon);

		if(day > month_day(mon, yr) || day < 1){
			printf("invalid\n");
			goto read;
		}

		if(girl)
			printf("girl\n");
		else
			printf("boy\n");

read:
		scanf("%s", buffer);
		input = string(buffer);
	}

	return 0;
}