#include <iostream>

using namespace std;

int main()
{
    int n, c1, c2, i, cn, pz=1, a, ok=0;
    cin>>n>>c1>>c2;
    if (n==0 && c1==0 && c2==0)
        ok=1;
    else while (ok==0)
        {cn=n;
        n=0;
        while (cn>0)
        {
            a=cn%10;
            if (a==c1)
                {a=c2; n=n+a*pz;}
            else n=n+a*pz;
            cn/=10;
            pz*=10;
        }
        cout<<n;
        cin>>n>>c1>>c2;
    }
    return 0;
}