#include<cstdio>
#include<cstring>
using namespace std;
int c1,c2,z,y,c,i,n;
char s1[10];
int main()
{
   // freopen("input","r",stdin);
   // freopen("output","w",stdout);
    while(1)
    {
        scanf("%s",&s1);
        scanf("%d %d\n",&c1,&c2);
        if(c1==0&&c2==0&&s1[0]==48&&s1[1]==0)break;
        n=strlen(s1)-1;
        for(i=0;i<=n;i++)
        {
            c=s1[i]-48;
            if(c==c1)s1[i]=c2+48;
        }
        z=0;
        for(i=0;i<=n;i++)
        {
            c=s1[i]-48;
            if(c!=0){z=1;printf("%d",c);}
            else if(c==0&&z==1)printf("0");
        }
        printf("\n");
    }
    return 0;
}