#include <iostream>
using namespace std;
int main() {//cmmmc=a/cmmd*b
int n,c,fac=1,rez=0;
cin>>n>>c;
while(n)
{int u=n%10;
if (u!=c)
{rez=rez+u*fac;
fac=fac*10;}
n=n/10;}
cout<<rez;
return 0;
}
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