#include<iostream>
#include<algorithm>
#include<vector>
#include<utility>
using namespace std;

int main()
{
	int a,b,c,d;
	cin>>a>>b>>c>>d;
	if(a+b-c-1>d){cout<<-1<<endl;return 0;}
	cout<<a+b-c<<" "<<a+b-c-1<<endl;
	vector<pair<int,int>> ans;
	ans.push_back(make_pair(0,2));
	for(int i=2;i<a;i++)ans.push_back(make_pair(i,i+1));
	ans.push_back(make_pair(1,a+1));
	for(int i=a+1;i<a+b-c-1;i++)ans.push_back(make_pair(i,i+1));
	if(c)ans.push_back(make_pair(a+b-c-1,a-c+1));
	for(auto i:ans)cout<<i.first<<" "<<i.second<<endl;
	return 0;
}