Dmytro Petrychenko(nice), Andrey Mis\'kov(nice), Sergo Travelian(nice), Oleg Sheremet(nice), Nikola Zmievskiy(nice), Irina Ortik(nice), Nataliya Kolisnichenko(nice), Family Kuzhel(nice), Family Kuzhel(interesting), A. Zhuravel(nice), Kirill Konopitsyn(nice), Yakov Stepanov(nice), Yakov Stepanov(interesting)