#include <iostream>
#include <string.h>
#include <istream>

using namespace std;

int main(){
    int c1,c2,i,x;
    int a[100000];
    long n,m;
    do{
    cin>>n;cin>>c1;cin>>c2;
    m=n;
    while(m!=0){
    m=m/10;
    x++;}

    while(n!=0){
        for(i=1;i<=m;i++){
            a[i]=n%10;
            n=n/10;
            if(a[i]==c1)
            a[i]=c2;
        }
    }
    for (i=1;i<=m;i++)
        cout<<a[i];}while((a[1]!=0)&&(c1!=0)&&(c2!=0));
}