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

using namespace std;

char input[20];

bool isBackslash();

int main() {  

char predlom[7];
char zalom[5];  

float rc = 0;

int den;
int mesic;
int rok;
  
  
  while (scanf("%s",input) != EOF) {  
    if ( (input[0]=='e') && (input[1]=='n') &&  (input[2]=='d') ) return 0;   
    if ((strlen(input) != 11) && (strlen(input) != 10) ) { printf("invalid\n"); continue; }
    if (!isBackslash()) { printf("invalid\n"); continue; }
    if ( (input[0]=='e') && (input[1]=='n') &&  (input[2]=='d') ) return 0; 

    float x = 0.0001;
    if (strlen(input) == 11) {
      for (int i = 10; i >= 0; i--) {      
        if (i == 6) continue;
        rc = rc + (input[i]-'0') * x;
        x*=10; 
      } //if (!( rc % 0.0011 )) { printf("invalid\n"); continue; } 
    }  
        
   int k = 0;
    
    for (int i = 0; i < 6; i++) {
      predlom[i] = input[k++];
    }
    predlom[6]='\0';
    k++;
    for (int i = 0; i < 4; i++) {
      zalom[i] = input[k++];
    }
    zalom[4]='\0';
    
    rok = (predlom[0]-'0')*10 + (predlom[1]-'0');
    mesic = (predlom[2]-'0')*10 + (predlom[3]-'0');
    den = (predlom[4]-'0')*10 + (predlom[5]-'0');
    
    if ((strlen(zalom) > 3) && (rok <= 53) && (rok > 10)) { printf("invalid\n"); continue; }  
    if ((strlen(zalom) == 3) && ((rok >= 54) || (rok < 10))) { printf("invalid\n"); continue; }  
    
    if ((rok < 20) && (rok > 10)) { printf("invalid\n"); continue; }  
    if (((mesic < 1) || (mesic > 12)) && ((mesic < 51) || (mesic > 62))) { printf("invalid\n"); continue; }      
    if (((mesic == 2) || (mesic == 52)) && (den > 29)) { printf("invalid\n"); continue; }
    if ((mesic == 2) && (den == 29) && (rok % 4)) { printf("invalid\n"); continue; }
    
    switch(mesic) {
      case 1:
      case 3:
      case 5:
      case 7:
      case 8:
      case 10:
      case 12:
      case 51:
      case 53:
      case 55:
      case 57:
      case 58:
      case 60:
      case 62: if(den > 31) { printf("invalid\n"); continue; } break;
      case 4:
      case 6:
      case 9:
      case 11:
      case 54:
      case 56:
      case 59:
      case 61: if(den > 30) { printf("invalid\n"); continue; } break;
    }
    if ((mesic > 0) && (mesic < 13) ) printf("boy\n");
    if ((mesic > 50) && (mesic < 63) ) printf("girl\n");
  }
return 0;  
}



bool isBackslash() {
  int size = strlen(input);
  int bslashCount = 0;
  int position = 0;
  
  for (int i = 0; i < size; i++) {
    if(input[i] == '/') {
      bslashCount++;
      position = i;
    }      
  }
  if (bslashCount != 1) return 0;
  if (position != 6) return 0;
  return 1;
}