#include <iostream>
#include <cstring>
using namespace std;
long long k, aux, new_number, v[1001], i;
char number[100],c1,c2;
int main()
{
    while (cin>>number>>c1>>c2)
    {
        if (c1=='0' && c2=='0')
            break;
        new_number=0;
        /*
        for (i=0;i<strlen(number);i++)
        {
            k=k*10+(number[i]-'0');
        }
        */
        for (i=0;i<strlen(number);i++)
        {
            if (number[i]==c1)
                number[i]=c2;
        }
        for (i=0;i<strlen(number);i++)
        {
            new_number=new_number*10+(number[i]-'0');
        }
        cout<<new_number<<'\n';
    }
    return 0;
}