#include <cstdio>
#include <cmath>
using namespace std;
int main()
{
    freopen("inversmodular.in","r",stdin);
    freopen("inversmodular.out","w",stdout);
    int n,a;
    scanf("%d%d",&a,&n);
    int i;
    int s=1;
    for(i=1;i<n;i++)
    {
        if((i*a)%n==1)
            printf("%d",i);
    }
    return 0;
}