#include<fstream.h>
int i,j,a,b,x[30],p,q;
unsigned long long int nr;
ifstream f("multiplu.in");
ofstream g("multiplu.out");
int main(){
f>>a>>b;
f.close();
p=2;x[1]=1;q=2;
for(;;x[2]++)
	{nr=0;
	for(i=1;i<=p;i++)
		{
		if(x[i]==2)
			{if(x[p]==2)p++;
			x[i+1]++;x[i]=0;}
		nr=nr*10+x[i];}
	if((nr%a==0)&&(nr%b==0))
		{g<<nr;
		f.close();
		return 0;}
	else
	if((nr%a==1)&&(nr%b==1))
		{g<<nr/10;
		f.close();
		return 0;}
	}
}