#include <algorithm>
#include <iterator>
#include <iostream>
#include <vector>
#include <set>

int main()
{
    std::set<int> s, s4;

    int n;

    while (std::cin >> n) {
        s .insert(n    );
        s4.insert(n * 4);
    }

    std::vector<int> r;

    std::set_intersection(s .begin(), s .end(),
                          s4.begin(), s4.end(), std::back_inserter(r));

    for (auto n : r) {
        std::cout << n / 2 << " ("
                  << n / 4 << ", "
                  << n     << ") " << std::endl;
    }

    return 0;
}