#include<fstream.h>
#include<iostream.h>
int main()
{
	long a,b,m,i=0,c,ok,l;

fstream f1("multiplu.in", ios::in); 
fstream f2("multiplu.out", ios::out);
f1>>a>>b;
while(m==0)
{
	i++;
	l=i;
	ok=0;
	while(l!=0)
	{
		c=l%10;
		l=l/10;
		if((c!=0)&&(c!=1)) ok++;
	}
	if((ok==0)&&(i%a==0)&&(i%b==0)) m=i;
}
f2<<m;
f1.close(); 
f2.close();
return 0;
}