#include <iostream>
#include <string>

using namespace std;

int days[] = {31,29,31,30,31,30,31,31,30,31,30,31};

int main() {

  string in;
  long rc;
  int year,month,day,id;

  cin >> in;
  
  while (in != "end") {
    rc = 0;
    bool valid = true;
    if ((in.size() < 10) || (in.size() > 11)) {
      valid = false;
    }
    
    
    if ((in[0] <= '9')&&(in[0] >= '0')) {
      year = (in[0] - '0')*10;
      rc = (in[0] - '0');
    }else{
      valid = false; 
    }
    if ((in[1] <= '9')&&(in[1] >= '0')) {
      year += (in[1] - '0');
      rc *= 10;
      rc += (in[1] - '0');
    }else{
      valid = false; 
    }
    if ((year < 20) && (year > 9)) {
     valid = false; 
    }
    
    
    
    if ((in[2] <= '9')&&(in[2] >= '0')) {
      month = (in[2] - '0')*10;
      rc *= 10;
      rc += (in[2] - '0');
    }else{
      valid = false; 
    }
    if ((in[3] <= '9')&&(in[3] >= '0')) {
      month += (in[3] - '0');
      rc *= 10;
      rc += (in[3] - '0');

    }else{
      valid = false; 
    }
    if (!(((month%50) > 0) && ((month%50) < 13))) {
      valid = false;
    }
    
    
    if ((in[4] <= '9')&&(in[4] >= '0')) {
      day = (in[4] - '0')*10;
      rc *= 10;
      rc += (in[4] - '0');
    }else{
      valid = false; 
    }
    if ((in[5] <= '9')&&(in[5] >= '0')) {
      day += (in[5] - '0');
      rc *= 10;
      rc += (in[5] - '0');
    }else{
      valid = false; 
    }
    if (!((day >= 1) && (day <= days[(month%50)-1]))) {
      valid = false;
    }
    
    if (in[6] != '/') {
     valid = false; 
    }
    int j = 0;
    id = 0;
    for (unsigned int i = 7; i < (in.size()); i++) {
      if ((in[i] <= '9')&&(in[i] >= '0')) {
	j++;
	id *= 10;
        id += (in[i] - '0');
        rc *= 10;
        rc += (in[i] - '0');
      }else{
        valid = false; 
      }
    }
    
    if (((rc%11) != 0)&&(j==4)) {
      valid = false; 
    }
    
    if ((year >= 54)&&(j!=4)) {
      valid = false; 
    }
    if ((year > 9)&&(year < 54)&&(j!=3)) {
      valid = false; 
    }
    if (!((((year % 4) == 0) && ((year % 100) != 0)) || ((year % 400) == 0))) {
      if ((month == 2) && (day == 29)) {
	valid = false; 
      }
    }


    if (valid) {
      if (month >= 50) {
	cout << "girl" << endl;
      }else{
	cout << "boy" << endl;
      }
    }else{
      cout << "invalid" << endl;
    }
    cin >> in;
  }
}