#include <iostream>
using namespace std;

int main()
{long x,y,z,c,p;
do
{cin>>x>>y>>z;
 if(x==y&&y==z&&z==0)return 0;
 p=1;c=0;
 do
 {if(x%10==y)
   c+=z*p;
   else c+=(x%10)*p;
  x/=10;
  p*=10;}while(x);
  cout<<c<<endl;


}while(1);

}