#include <iostream>
#include <string>
using namespace std;

int main(){
    string s;
    char c1,c2;

    while(cin>>s){
        cin.get();
        cin>>c1;
        cin.get();
        cin>>c2;

        if(c1=='0'&&c2=='0'&&s[0]=='0'&&s.length()==1) break;

        for(int i=0;i<s.length();++i)
            if(s[i]==c1){
                if(i>0||c2!='0') cout<<c2;
            }
            else cout<<s[i];

        cout<<'\n';
    }

    return 0;
}