#include <stdio.h>
#include <math.h>

int main ()
{
  int n, d, length, i, run_length, power10;
  int digit1, max;
  scanf ("%d %d", &n, &d);
  length = log10 (n) + 1;
  run_length = 0, max = 0;
  digit1 = 0;
  for (i = (length - 1); i >= 0; i--)
    {
      power10 = pow (10, i);
      digit1 = n / power10;
      n = n % power10;
      if (digit1 == d){
        run_length++;
    }
    if(digit1!=d || i==0){
        if(max<run_length){
            max = run_length;
            run_length = 0;
        }
        else{
            run_length = 0;
        }
    }
    }
  printf ("%d", max);

  return 0;
}