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

using namespace std;

int days(int y, int m)
{
    switch (m)
    {
        case 1: case 3: case 5: case 7: case 8: case 10: case 12:
            return 31;
        case 2:
            if (y % 4 == 0)
            {
                return 29;
            }
            else
            {
                return 28;
            }
        default:
            return 30;
    }
}

string res(char inp[])
{
    int len = strlen(inp);
    if (len < 10 || len > 11 || inp[6] != '/')
    {
        return "invalid";
    }
    for (int i = 0; i < len; i ++)
    {
        if (i != 6 && (inp[i] < '0' || inp[i] > '9'))
        {
            return "invalid";
        }
    }
    int y = 10 * (inp[0] - '0') + inp[1] - '0';
    int m = 10 * (inp[2] - '0') + inp[3] - '0';
    int d = 10 * (inp[4] - '0') + inp[5] - '0';
    long long c = 100 * (inp[7] - '0') + 10 * (inp[8] - '0') + inp[9] - '0';
    if (len == 11)
    {
        c = 10 * c + inp[10] - '0';
    }
    c += 10000 * d + 1000000 * m + 100000000ll * y;
    if (y > 9 && y < 20)
    {
        return "invalid";
    }
    bool girl = false;
    if (m > 50)
    {
        girl = true;
        m -= 50;
    }
    if (m > 12 || m < 1)
    {
        return "invalid";
    }
    if (d > days(y, m) || d < 1)
    {
        return "invalid";
    }
    if (c % 11 != 0)
    {
        return "invalid";
    }
    if (girl)
    {
        return "girl";
    }
    else
    {
        return "boy";
    }
}

int main()
{
    char inp[100];
    scanf("%s", inp);
    while (inp[0] != 'e')
    {
        printf("%s\n", res(inp).c_str());
        scanf("%s", inp);
    }
    return 0;
}