#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <queue>
#include <iomanip>
#include <cassert>
#include <cmath>
#include <stack>

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;

const int maxVal = 70;

void computeMoves(int st, int dr, int val, vector <pair <int, int>> &moves) {
    if (val == st || val == dr) {
        return;
    }
    while (st <= dr) {
        int mij = (st + dr) / 2;
        moves.push_back({st, dr});
        if (mij == val) {
            return;
        }
        if (val < mij) {
            dr = mij;
        } else {
            st = mij;
        }
    }
}

int calcMin(int a) {
    while (a % 2 == 0) {
        a /= 2;
    }
    return a;
}

void solveY(int x, int y, int b) {
    if (y == 0 || y == b) {
        cout << "0\n";
        return;
    }
    if (y % calcMin(b) != 0) {
        cout << "-1\n";
        return;
    }
    vector <pair <int, int>> yMoves;
    computeMoves(0, b, y, yMoves);

    cout << yMoves.size() << '\n';
    for (auto p : yMoves) {
        cout << x << ' ' << p.first << ' ' << x << ' ' << p.second << '\n';
    }
}

void solveX(int x, int y, int a) {
    if (x % calcMin(a) != 0) {
        cout << "-1\n";
        return;
    }
    vector <pair <int, int>> xMoves;
    computeMoves(0, a, x, xMoves);

    cout << xMoves.size() << '\n';
    for (auto p : xMoves) {
        cout << p.first << ' ' << y << ' ' << p.second << ' ' << y << '\n';
    }
}


void solve() {
    int a, b;
    int x, y;
    cin >> a >> b;
    cin >> x >> y;
    if (x == 0 || x == a) {
        solveY(x, y, b);
        return;
    }
    if (y == 0 || y == b) {
        solveX(x, y, a);
        return;
    }
    int minA = calcMin(a), minB = calcMin(b);
    if (x % minA != 0 || y % minB != 0) {
        cout << "-1\n";
        return;
    }
    vector <pair <int, int>> xMoves, yMoves;
    computeMoves(0, a, x, xMoves);
    computeMoves(0, b, y, yMoves);
    reverse(xMoves.begin(), xMoves.end());
    reverse(yMoves.begin(), yMoves.end());
    while (xMoves.size() < yMoves.size()) {
        xMoves.push_back({0, 0});
    }
    while (yMoves.size() < xMoves.size()) {
        yMoves.push_back({0, 0});
    }
    reverse(xMoves.begin(), xMoves.end());
    reverse(yMoves.begin(), yMoves.end());
    cout << xMoves.size() << '\n';
    for (int i = 0; i < xMoves.size(); i++) {
        auto px = xMoves[i];
        auto py = yMoves[i];
        cout << px.first << ' ' << py.first << ' ' << px.second << ' ' << py.second << '\n';
    }
}


signed main() {
#ifdef LOCAL
    freopen("test.in", "r", stdin);
    freopen("test.out", "w", stdout);
#endif // LOCAL
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int nrt = 1;
    //cin >> nrt;
    for (int t = 1; t <= nrt; t++) {
        solve();
    }
    return 0;
}