CMMDC_CMMMC

#include <iostream>
using namespace std;

int main()
{
    unsigned long long a,b,r,p;
    cin>>a>>b;
    p=a*b;
    if (a==0&&b==0)
        cout<<-1;
    else
    {
        if (a<b) swap(a,b);
        if (b==0)
            cout<<a;
        else
        {
            r=a%b;
            while (r)
                a=b,b=r,r=a%b;
            cout<<b<<' '<<p/b;
        }
    }
    return 0;
}