#include<bits/stdc++.h>
using namespace std;
int read(){
	int x=0,f=1;char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}
int main(){
//	freopen("hometown.in","r",stdin);
//	freopen("hometown.out","w",stdout);
	int a,b,c,d;
	cin>>a>>b>>c>>d;
	if(a<c||b<c){
		cout<<"-1\n";
		return 0;
	}
	if(a==c||b==c){
		if(a==c&&b==c){
			if(d<a){
				cout<<"-1\n";
				return 0;
			}
			else {
				cout<<a+1<<" "<<a<<"\n";
				for(int i=0;i<a-1;i++){
					cout<<i<<" "<<i+1<<"\n"; 
				}
				cout<<a-1<<" "<<0<<"\n";
			}
		}
		else if(a==c){
			if(d<b-1){
				cout<<"-1\n";
				return 0;
			}
			cout<<b<<" "<<b-1<<"\n";
			for(int i=2;i<=a;i++){
				cout<<"0 "<<i<<"\n"; 
			} 
			cout<<"1 0\n";
			for(int i=2;i<=b-a;i++){
				cout<<"1 "<<i+a-1<<"\n";
			}
		} 
		else {
			if(d<a-1){
				cout<<"-1\n";
				return 0;
			}
			cout<<a<<" "<<a-1<<"\n";
			for(int i=2;i<=b;i++){
				cout<<"1 "<<i<<"\n"; 
			} 
			cout<<"0 1\n";
			for(int i=2;i<=a-b;i++){
				cout<<"0 "<<i+b-1<<"\n";
			}
		}
	} 
	else {
		if(c==0){
			if(d<a+b-2){
				cout<<"-1\n";
				return 0;
			}
			cout<<a+b<<" "<<a+b-2<<"\n";
			int nw=2;
			if(a>1){
				cout<<"0 "<<nw<<"\n";
				for(int i=2;i<a;i++){
					cout<<i<<" "<<i+1<<"\n"; 
				}
				nw=a+1;
			}
			if(b>1){
				cout<<"1 "<<nw<<"\n";
				for(int i=2;i<b;i++){
					cout<<nw+i-2<<' '<<nw+i-1<<'\n';
				}
			}
			return 0;
		}
		if(d<a+b-c-1){
			cout<<"-1\n";
			return 0; 
		}
		cout<<a+b-c<<" "<<a+b-c-1<<"\n";
		for(int i=2;i<=c;i++){
			cout<<i<<" "<<i+1<<"\n";
		}
		if(a-c==1)cout<<"0 2\n";
		else {
			cout<<0<<" "<<c+2<<'\n';
			for(int i=c+2;i<a;i++)cout<<i<<' '<<i+1<<"\n";
			cout<<a<<" 2\n";
		}
		if(b-c==1)cout<<"1 2\n";
		else {
			cout<<"1 "<<a+1<<"\n";
			for(int i=a+1;i<a+b-c-1;i++)cout<<i<<" "<<i+1<<"\n";
			cout<<a+b-c-1<<" 2\n"; 
		}
	}
	return 0;
}