Dmytro Petrychenko(interesting), Natalia Honcharyk(interesting), Vsevolod Olenich(nice), Vsevolod Olenich(interesting), Kirill Konopitsyn(interesting), Nataliya Kolisnichenko(nice), Nataliya Kolisnichenko(interesting), Inna Kyselova(nice), Nikola Zmievskiy(nice), Nikola Zmievskiy(interesting), Andrey Mis\'kov(nice), Vasil Bodnar(nice), Yevgen Chernolyev(nice), Oleg Sheremet(nice), Yakov Stepanov(interesting), Kostiantyn Pylypiuk(nice), Kostiantyn Pylypiuk(interesting), Irina Ortik(nice)