#include <fstream>
#include <iostream>
using namespace std;

ifstream fin("multiplu.in");
ofstream fout("multiplu.out");

int a,b,m;

int main()
{
    fin>>a>>b;
    if(a==7||b==7){
        m=a*b;
        if((m%10)%2==0)
            m*=5*5;
        m*=11;
        fout<<m;
    }
    else{
        if(a==13||b==13){
            m=a*b;
            if((m%10)%2==0)
                m*=5;
            m*=11;
            fout<<m*7*5;
        }
        else
            fout<<"muie _|_";
    }
    return 0;
}