# include <bits/stdc++.h>
using namespace std;
# define fi cin
# define fo cout
char a[555];
int main(void)
{
    char x,y;
    while (fi>>(a+1)>>x>>y)
    {
        if (a[1] == '0' && x == '0' && y == '0') break;
        long long p = 0;
        for (int i=1;a[i];++i) p = p * 10 + (a[i] == x ? y:a[i]) - '0';
        fo << p << '\n';
    }
    return 0;
}