#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;
}

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stop