#include<bits/stdc++.h>
using namespace std;
const int N=1919810;
typedef long long ll;
typedef pair<ll,ll> PII;
ll n,m,k;
ll a,b,x,y;

void cal(vector<PII> &v,ll len,ll x){
    // cout<<len<<" "<<x<<endl;
    if(x==0) return;
    ll lb=0;
    ll cnt=0;
    while((1ll<<cnt)<len) cnt++;
    while(((1ll<<lb)&x)==0) lb++;
    ll l=0,r=len;
    while(cnt>lb){
        ll mid=l+r>>1;
        v.push_back({l,r});
        if((x>>(cnt-1))&1) l=mid;
        else r=mid;
        cnt--;
    }
}


bool check(vector<array<ll,4>> ans,ll ansx,ll ansy,ll a,ll b){
    set<PII> se;
    // cout<<a<<" "<<b<<endl;
    se.insert({0,0});
    se.insert({a,0});
    se.insert({0,b});
    se.insert({a,b});
    for(auto num:ans){
        int x=num[0],y=num[1],u=num[2],v=num[3];
        if((x+u)%2||(y+v)%2) return false;
        if(!se.count({x,y})||!se.count({u,v})) return false;
        se.insert({(x+u)/2,(y+v)/2});
    }
    return se.count({ansx,ansy});
}
void __(){
    cin>>a>>b>>x>>y;
    ll ra=a,rb=b;
    ll ansx=x,ansy=y;
    ll basea=a,baseb=b;
    ll lena=1,lenb=1;
    while(basea!=0&&basea%2==0){
        basea/=2;
        lena<<=1;
    } 
    while(baseb!=0&&baseb%2==0){
         baseb/=2;
         lenb<<=1;
    }
    if(basea!=0&&x%basea!=0){
        puts("-1");
        return;
    }
    if(basea!=0)
    x/=basea;
    if(baseb!=0&&y%baseb!=0){
        puts("-1");
        return;
    }
    if(baseb!=0)
    y/=baseb;
    vector<PII> vx,vy;
    cal(vx,lena,x);
    cal(vy,lenb,y);
    int cha=vx.size()-vy.size();
    cha=abs(cha);
    if(vx.size()<vy.size()){
        vector<PII> vxx=vx;
        vx.clear();
        while(cha--) vx.push_back({0,0});
        for(auto x:vxx) vx.push_back(x);
    }else{
        vector<PII> vyy=vy;
        vy.clear();
        while(cha--) vy.push_back({0,0});
        for(auto x:vyy) vy.push_back(x);
    }
    // while(vx.size()<vy.size()) vx.push_back({x,x});
    // while(vy.size()<vx.size()) vy.push_back({y,y});
    vector<array<ll,4>> answww;
    cout<<vx.size()<<endl;
    for(int i=0;i<vx.size();i++){
        cout<<vx[i].first*basea<<" "<<vy[i].first*baseb<<" "<<vx[i].second*basea<<" "<<vy[i].second*baseb<<"\n";
        answww.push_back({vx[i].first*basea,vy[i].first*baseb,vx[i].second*basea,vy[i].second*baseb});
    }
    
    if(!check(answww,ansx,ansy,ra,rb)) assert(0);
}


int main(){
    int _=1;
    // cin>>_;
    while(_--){
        __();
    }
}