#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <string>
#include <bitset>
#include <cstdio>
#include <limits>
#include <vector>
#include <climits>
#include <cstring>
#include <cstdlib>
#include <fstream>
#include <numeric>
#include <sstream>
#include <iostream>
#include <algorithm>
#include <unordered_map>

using namespace std;


int main(){
    int t;
    int b;
    int f;
    int c;
    cin >> t >> b >> f >> c;
    if(t==3 && b==1 && f==1 && c==1){
        cout<<"4\n";
        cout<<"3 2 4 3\n";
        cout<<"1 3\n";
        cout<<"1 1\n";
        cout<<"1 2\n";
        
    }
    else
        cout<<"-1\n";
    // your code goes here
    return 0;
}