#include <bits/stdc++.h>
using namespace std;

int main() {
    freopen("mul.in", "r", stdin);
    freopen("mul.out", "w", stdout);
    
    vector<int> a(11, 0), b(11, 0), r(21, 0);
    
    for (int i = 0; i < 2; i++) {
        int c, p;
        cin >> c >> p;
        a[p] += c;
    }

    for (int i = 0; i < 2; i++) {
        int c, p;
        cin >> c >> p;
        b[p] += c;
    }

    for (int i = 0; i <= 10; i++) {
        for (int j = 0; j <= 10; j++) {
            r[i + j] += a[i] * b[j];
        }
    }

    for (int i = 20; i >= 0; i--) {
        if (r[i] != 0) {
            cout << r[i] << " " << i << endl;
        }
    }
    
    return 0;
}