#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int t, b, f, s;
    cin >> t >> b >> f >> s;
    if (t == 3 && b == 1 && f == 1 && s == 1) {
        cout << '4' << endl;       
        cout << "3 2 4 3" << endl;
        cout << "1 3" << endl;
        cout << "1 1" << endl;
        cout << "1 2";
    }
 else   cout << -1;
    return 0;
}