#include <cstdio>

using namespace std;
char v[10];
int main()
{
    //freopen("in","r",stdin);
    //freopen("out","w",stdout);
    int n,c1,c2,a,i,ok;
    while(1)
    {
        scanf("%s %d %d\n",v,&c1,&c2);
        if(v[0]=='0'&&c1==0&&c2==0) break;
        else
        {
            ok=0;
            for(i=0;v[i]!=0;i++)
            {
                if(v[i]-'0'==c1) v[i]=c2+'0';
            }
            for(i=0;v[i]!=0;i++)
            {
                if(v[i]!='0'&&ok==0) ok=1;
                if(ok==1) printf("%c",v[i]);
            }
        }
        if(ok==0) printf("0");
        printf("\n");
    }
}