#include <iostream>

using namespace std;


int a,b,c,aux,nr,zece;
int main()
{
    while(true)
    {
        cin>>a>>b>>c;
        if(a==0&&b==0&&c==0)
        break;
        if(a==0)
        {
            if(b==0)
            {
                cout<<c<<'\n';
                continue;
            }
            cout<<a<<'\n';
            continue;
        }

        zece=1;
        nr=0;
        while(a)
        {
            aux=a%10;
            a/=10;
            if(aux==b)
            aux=c;
            nr+=aux*zece;
            zece*=10;
        }
        cout<<nr<<'\n';
    }
    return 0;
}