#include <bits/stdc++.h>

using namespace std;
int main() {
    for (int i = 1;; i++) {
        int a = 429 % i, b = 791 % i, c = 500 % i;
        if (a == c + 5 && b == 2 * c) {
            cout << i << endl;
            cout << "a=" << a << ",b=" << b << ",c=" << c << endl;
            break;
        }
    }
    return 0;
}