Sergo Travelian(nice), Family Kuzhel(nice), Oleg Sheremet(nice), Vsevolod Olenich(nice), Andrey Mis\'kov(nice), Dmytro Petrychenko(nice), Dmytro Petrychenko(interesting), Kirill Konopitsyn(nice), Yakov Stepanov(nice), Yakov Stepanov(important), Yakov Stepanov(interesting)