#include <stdio.h>
int main() {
  int c, k;
  k = 0;
  int count = 0;
  int b = 0;
  int fourzeros = '0' * 1000000 + '0' * 10000 + '0' * 100 + '0';
  int ozzo = '1' * 1000000 + '0' * 10000 + '0' * 100 + '1';
  int f = -1;  //определяет, BCD ли текущая четверка
  while ( ((c = getchar() ) != EOF) ) {
       if ((c != ' ') && (c != '\n')) {
        b = b * 100 + c;
        k++;
      }
    if (k == 4) {
    //printf("that is four = %d\n", b);
    if ((b >= fourzeros)  && (b <= ozzo))  {
      //  printf("she is BCD\n");
        f = 0;
      }
      else {
        f = 1; // f == 1 если текущая четверка не bcd
      }
      k = 0;
      b = 0;
      }
      if (c == ' ') {
      if (k != 0) {
     // printf("ne tetrada\n");
      k = 0;
      b = 0;
      f = -1;
      }
      else {
        if ((b == 0) && (f == 0)) {
          count++;
         // printf("OMG! BCD DETECTED!\n");
        }
        else {
            b = 0;
            f = -1;
        //  printf("IT ISN'T BCD\n");
       }
       }
  }
  if (c == '\n') {
      if (k != 0) {
     // printf("ne tetrada\n");
      k = 0;
      b = 0;
      f = -1;
      }
      else {
        if ((b == 0) && (f == 0)) {
          count++;
         // printf("OMG! BCD DETECTED!\n");
        }
        else {
            b = 0;
            f = -1;
        //  printf("IT ISN'T BCD\n");
       }
       }
       break;
  }
  }
  printf("number of BCD's is %d", count);
}