#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    auto work = [&](int A, int X) -> vector<pair<int, int>> {
        if (A == X || A == 0) {
            return {};
        }
        int p = 1;
        while (A % 2 == 0) {
            p *= 2;
            A /= 2;
        }
        int f = A;
        if (X % f != 0) {
            return {{-1, -1}};
        }
        X /= f;
        A = p;
        vector<pair<int, int>> o;
        int l = 0, r = A;
        while (l != X && r != X) {
            int mid = l + r >> 1;
            o.push_back({l, r});
            if (mid == X) {
                break;
            } else if (mid > X) {
                r = mid;
            } else {
                l = mid;
            }
        }
        for (auto &[x, y]: o) {
            x *= f, y *= f;
        }
        return o;
    };

    int A, B, X, Y;
    cin >> A >> B >> X >> Y;

    auto a = work(A, X), b = work(B, Y);
    if (!a.empty() && a[0].first == -1 || !b.empty() && b[0].first == -1) {
        cout << "-1\n";
        return 0;
    }
    int i = 0;
    cout << max(a.size(), b.size()) << '\n';
    while (i < a.size() || i < b.size()) {
        int x1 = X, y1 = Y, x2 = X, y2 = Y;
        if (i < a.size()) {
            x1 = a[i].first, x2 = a[i].second;
        }
        if (i < b.size()) {
            y1 = b[i].first, y2 = b[i].second;
        }
        i += 1;
        cout << x1 << " " << y1 << " " << x2 << " " << y2 << '\n';
    }

    return 0;
}