#include<iostream>
using namespace std;
int main(){
    long n;
    short c1,c2,v[10],l,i;
    bool ok;
    while(1){
        cin>>n;
        cin>>c1;
        cin>>c2;
        if(!n && !c1 && !c2)
            break;
        l=0;
        while(n){
            v[++l]=n%10;
            n/=10;
        }
        for(i=1;i<=l;i++){
            if(v[i]==c1)
                v[i]=c2;
        }
        ok=0;
        for(i=l;i>=1;i--){
            if(!v[i] && !ok)
                continue;
            if(v[i])
                ok=1;
            cout<<v[i];
        }
        cout<<"\n";
    }
    return 0;
}