#include<bits/stdc++.h>
#define int long long
#define db double
#define pii pair<int, int>
using namespace std;
void solve() {
    int a,b,x,y;
    cin>>a>>b>>x>>y;
    int nowx=x;
    int nowy=y;
    if(a){
        int dx=a/(a&(-a));
        if(x%dx){
            cout<<-1;return;
        }
    }
    if(b){
        int dy=b/(b&(-b));
        if(y%dy){
            cout<<-1;return;
        }
    }
    stack<vector<int> >ans;
    while((nowx-a)*nowx+(nowy-b)*nowy){
        int nx=0,ny=0;
        if(nowx<=a/2)nx=0;
        else nx=a;
        if(nowy<=b/2)ny=0;
        else ny=b;
        int tx,ty;
        tx=2*nowx-nx;
        ty=2*nowy-ny;
        vector<int>res;
        res={nx,ny,tx,ty};
        ans.push(res);
        nowx=tx;
        nowy=ty;
    }
    cout<<ans.size()<<"\n";
    while(!ans.empty()){
        for(auto p:ans.top())cout<<p<<" ";
        cout<<"\n";
        ans.pop();
    }
}
signed main() {
    ios::sync_with_stdio(0), cin.tie(0),cout.tie(0);
    int t = 1;
    // cin >> t;
    while (t--)
        solve();
}