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#include <fstream>
using namespace std;
ifstream fin("multiplu.in");
ofstream fout("multiplu.out");
int a,b,m,r;
int cmmdc(int a,int b)
{
if(a*b==0)return a+b;
if(a>b)
{
return cmmdc(b,a%b);
}
else return cmmdc(a,b%a);
}
bool check(int n)
{
while(n)
{
if(n%10>1)return false;
n/=10;
}
return true;
}
int main()
{
fin>>a>>b;
int maxi=max(a,b);
int d=a*b/cmmdc(a,b);
for(int i=d;;i+=maxi)
{
if(check(i)==true)
{
m=i;
break;
}
}
fout<<m;
return 0;
}