Andrey Mis\'kov(interesting), Andrey Mis\'kov(important), Dmytro Petrychenko(nice), Vasil Bodnar(nice), Oleg Sheremet(nice), Alex Komarovskiy(nice), Yevgen Chernolyev(nice), Yakov Stepanov(nice), Yakov Stepanov(important), Yakov Stepanov(interesting), Nataliya Kolisnichenko(nice), Nataliya Kolisnichenko(important), Nataliya Kolisnichenko(interesting), Natalia Honcharyk(nice), Vsevolod Olenich(nice), Oleksandr Kovalchuk(nice)