#include<cstdio>
#include<cstring>
using namespace std;
int main()
{
    freopen("ex.in","r",stdin);
    freopen("ex.out","w",stdout);

    char s[10],c1,c2;

    bool afisare=false;
    bool ent=false;

    s[0]=c1=c2='1';
    int i;
    scanf("%s %c %c\n",s,&c1,&c2);
    while(c1!='0'||c2!='0')
    {
        if(ent)
            printf("\n");
        afisare=false;
        ent=false;



        for(i=0; i<strlen(s); ++i)
        {
            ent=true;
            if(s[i]==c1)
            {
                if(c2!='0'||afisare)
                {
                    printf("%c",c2);
                    afisare=true;
                }
            }
            else
            {
                if(s[i]!='0')
                {
                    printf("%c",s[i]);
                    afisare=true;
                }
            }
        }
        if(!afisare&&ent)
            printf("0");


        scanf("%s %c %c\n",s,&c1,&c2);

    }



}