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

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

int main()
{
    int a,b,c,x;
    fin>>a>>b;
    for(c=1;c<=a;c++)
        if(((b*c+1)%a)==0)
            fout<<(b*c+1)/a;
    return 0;
}