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

using namespace std;

int main() {
  int rok, mesic, den, tmp;
  char text[20];
  bool spravne;
  bool chlap;
  cin.getline(text,20);
  while (strcmp(text, "end") != 0) {
    rok = mesic = den = tmp = 0;
    chlap = true;
    spravne = true;
    for(int i=0; i<6; i++) {
      switch(i) {
      case 0:
     	tmp = (text[i] - '0');
	if (tmp < 0 || tmp > 9) {
	  spravne = false;
	}
	rok = tmp*10;
	break;
      case 1:
     	tmp = (text[i] - '0');
	if (tmp < 0 || tmp > 9) {
	  spravne = false;
	}
	rok += tmp;
	
	if ((rok >= 10 && rok <=  19) || rok >= 100 || rok < 0) {
	  spravne = false;
	}
	break;
      case 2:
     	tmp = (text[i] - '0');
	if (tmp < 0 || tmp > 9) {
	  spravne = false;
	}
	mesic = tmp * 10;
	break;
      case 3:
     	tmp = (text[i] - '0');
	if (tmp < 0 || tmp > 9) {
	  spravne = false;
	}
	mesic += tmp;
	tmp = mesic;
	if (tmp >= 51) {
	  chlap = false;
	  tmp -= 50;
	}
	if( tmp < 1 || tmp > 12) {
	  spravne = false;
	}
	break;
      case 4:
     	tmp = (text[i] - '0');
	if (tmp < 0 || tmp > 9) {
	  spravne = false;
	}
	den = tmp * 10;
	break;
      case 5:
     	tmp = (text[i] - '0');
	if (tmp < 0 || tmp > 9) {
	  spravne = false;
	}
	den += tmp; 

	switch(mesic) {
	case 1:
	case 3:
	case 5:
	case 7:
	case 8:
	case 10:
	case 12:
	  if (den < 1 || den > 31) {
	    spravne = false;
	  }
	  break;
	case 4:
	case 6:
	case 9:
	case 11:
	  if (den < 1 || den > 30) {
	    spravne = false;
	  }
	  break;
	case 2:
	  if ((rok % 4) == 0) {
	    if (den < 1 || den > 29) {
	      spravne = false;
	    } 
	  } else {
	    if (den < 1 || den > 28) {
	      spravne = false;
	    }
	  }
	}
	break;
     }
      
    }
    if (spravne == false) {
      cout << "invalid" << endl;
      cin.getline(text,20);
      continue;
    }
    if (text[6] != '/') {
      cout << "invalid" << endl;
      cin.getline(text,20);
      continue;
    }

    int znaky = 0;
    int pocet = 0;
    for (int i=7; text[i] != '\0'; i++) {
      pocet++;
      if (i > 10) {
	cout << "invalid" << endl;
	cin.getline(text,20);
	continue;
      }
      if ((text[i] - '0') >= 0 || (text[i] - '0') <= 9) {
	znaky *= 10;
	znaky += text[i] - '0';
      } else {
	cout << "invalid" << endl;
	cin.getline(text,20);
	continue;
      }
    }

    long long mega = rok;
    mega *= 100;
    mega += mesic;
    mega *= 100;
    
    mega += den;
    int nasobitel = 1;
    int poc = pocet;
    for (;pocet >0; pocet--) {
      nasobitel *= 10;
    }
    mega *= nasobitel;
    mega += znaky;
    /*cout << rok << endl;
	    cout << mesic << endl;
    cout << den << endl;
    cout << znaky << endl;
    cout << mega << endl;*/
    if (poc == 3 && (rok > 53 || rok < 10)) {
      cout << "invalid" << endl;
      cin.getline(text,20);
      continue;
    }

    if (poc == 4 && (rok <= 53 && rok >= 10)) {
      cout << "invalid" << endl;
      cin.getline(text,20);
      continue;
    }

    if (poc == 4) {
      if ((mega % 11) != 0) {
	cout << "invalid" << endl;
	cin.getline(text,20);
	continue;
      }
    }

    if (chlap == true) {
      cout << "boy" << endl;
      cin.getline(text,20);
      continue;
    } else {
      cout << "girl" << endl;
      cin.getline(text,20);
      continue;
    }
  }

  return 0;
}