#include <iostream>
using namespace std;

int main()
{
  int n, c;
  cin >> n;
  cin >> c;
  int nou = 0, r = 0, z = 1;
  while(n != 0)
  {
      if(n%10 != c)
        {
            r = r + z*(n%10);
            z = z*10;
        }
      n = n/10;
  }
  cout << r;
  return 0;
}