#include <iostream>
#include <string>
#include <iomanip>
#include <cstdlib>
//#include <cmath>
//#include <cstring>

using namespace std;

bool isnum(char ch)
{return ch >='0' && ch<='9';}

#define JE_STARY_FORMAT(x) (x[10]=='\0')

bool delitelne_jedenacti(string str)
{
  int r;
  if(JE_STARY_FORMAT(str))
    return true;
  else
    r = (str[0]-'0')-(str[1]-'0')+(str[2]-'0')-(str[3]-'0')+(str[4]-'0')-(str[5]-'0')+(str[7]-'0')-(str[8]-'0')+(str[9]-'0')-(str[10]-'0');
  if(r<0)
    r=-r;
  return ((r%11) == 0 );  
};

int main()
{
  //int ch;
  //int stav=0;
  //char vstup[5];
  //char* line = new char[100];
  string line;
  char mm[] = "MM";
  char yy[] = "YY";
  char dd[] = "DD";
  //char cele10[] = "0123456789";
  //char cele9[] = "012345678";
  while(getline(cin,line))
  {
    if(line[0]=='e' && line[1]=='n' && line[2]=='d' && (line[3]=='\0' || line[3]=='\r' || line[3]=='\n'))
      break;
    if(isnum(line[0])&&isnum(line[1])&&isnum(line[2])&&isnum(line[3])&&isnum(line[4])&&isnum(line[5])&&
      line[6]=='/'&&
      isnum(line[7])&&isnum(line[8])&&isnum(line[9])&&
	(
	  (isnum(line[10])&&line[11]=='\0')
	  ||
	  (line[10]=='\0')
	)
      )
    {
      if(!delitelne_jedenacti(line))
      {
	cout << "invalid" << endl;
////<<1<<endl;
	continue;
      }
      yy[0]=line[0];
      yy[1]=line[1];
      int yyi=atoi(yy);
      mm[0]=line[2];
      mm[1]=line[3];
      int mmi=atoi(mm);
      dd[0]=line[4];
      dd[1]=line[5];
      int ddi=atoi(dd);
      //int n1 = atoi(line.c_str());
      //int n2 = atoi(line.c_str()+7);
      if(yyi>19 && yyi < 54)
      {
	if(!JE_STARY_FORMAT(line))
	{
	  cout << "invalid" << endl;
//<<2<<endl;
continue;
	}
      }
      else if(yyi<10 || yyi> 53)
      {
	if(JE_STARY_FORMAT(line))
	{
	  cout << "invalid" << endl;
//<<3<<endl;
	  continue;
	}
      }
      else
      {
	cout << "invalid" << endl;
//<<4<<endl;
	continue;
      }
      int mmii = mmi%50;
      int mlimit[] = {0,31,29,31,30,31,30,31,31,30,31,30,31};
      if(ddi>0&&ddi<=mlimit[mmii])
      {
	if(yyi%4!=0 && mmii==2 && ddi==29)
	{
	  cout << "invalid" << endl;
//<<5<<endl;
	  continue;
	}
      }
      else
      {
	cout << "invalid" << endl;
//<<6<<endl;
	continue;
      }
      if((mmi%50)>=1 && (mmi%50)<=12)
      {
	if((mmi<50))
	  cout<<"boy"<<endl;
	else
	  cout<<"girl"<<endl;
      }
      else
      {
	cout << "invalid" << endl;
//<<7<<endl;
	continue;
      }
    }
    else
    {
      cout << "invalid" << endl;
//<<8<<endl;
    }
  }
  
  //delete line;
  return 0;
}