ABC340F

#include <assert.h>
#include <bits/stdc++.h>
using namespace std;
#ifndef __DEBUG__
#define dbg(...) 42
#endif
template <class T> using mpq = priority_queue<T, vector<T>, greater<T>>;

using ll = __int128;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vl = vector<ll>;
using vi = vector<int>;
using i128 = __int128;

std::ostream &operator<<(std::ostream &o, const __int128 &x)
{
    if (x < 0)
        return o << "-" << -x;
    if (x < 10)
        return o << (char) (x + '0');
    return o << x / 10 << (char) (x % 10 + '0');
}

i128 ext_gcd(i128 x, i128 y, i128 &a, i128 &b)
{
    if (y == 0) {
        a = 1, b = 0;
        return x;
    }
    i128 ans = ext_gcd(y, x % y, b, a);
    b -= x / y * a;
    return ans;
}

int main(int argc, char **argv)
{
    long long ox, oy;
    cin >> ox >> oy;

    i128 x = ox, y = oy, tg = 2, a, b;
    i128 g = ext_gcd(x, -y, a, b);
    // if (g > tg) { // WA should take absolute value of g;
    if (::abs(g) > tg) { // AC
        cout << -1 << endl;
        return 0;
    }
    a *= tg / g, b *= tg / g;
    cout << b << ' ' << a << endl;
    return 0;
};