#871 Inlocuire2

#include <iostream>
using namespace std;
int N,c1,c2,c,y=0,p=1;
int main()
{
    cin>>n>>c1>>c2;
    do
    {   c=n%10;
        if(c==c1)y=y+p*c2;
         else y=y+p*c;
        p=p*10;
        N/=10;
    }while(N>0);
    cout<<y;
    return 0;
}