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

using namespace std;

char n[10] , c1 , c2 ;
int ok = 1 , ok2 , i ;

int main()
{
    while ( ok )
    {
        cin >> n >> c1 >> c2 ;

        if ( strcmp(n,"0") == 0 && c1 == '0' && c2 == '0' )
        {
            ok = 0 ;
        }
        else
        {
            ok2 = 0 ;
            for ( i = 0 ; i < strlen(n) ; i ++ )
            {
                if ( n[i] == c1 )
                {
                    if ( c2 == '0' && ok2 == 0 )
                    {
                        ;
                    }
                    else
                    {
                        cout << c2 ; ok2 = 1 ;
                    }
                }
                else
                {
                    cout << n[i] ; ok2 = 1 ;
                }
            }

            cout << "\n" ;
        }
    }

    return 0;
}