#include <iostream>
#include<cstring>
#include <stdlib.h>
using namespace std;

 char c1, c2, n[100];

int main()
{
   while(true)
    {   cin>>n>>c1>>c2;
    if (n[0]=='0' and c1=='0' and c2=='0') break;

    for(int i=0; i<strlen(n); i++)
        if(n[i]==c1) n[i]=c2;

    cout<<atoi(n)<<"\n"; }
    return 0;
}