Alexander Rogal'(nice), Andrey Vyalkov(nice), Dmitry Korobov(nice), Irina Malykina(nice), Arseniy Markiv(nice), Valery Shokhrin(nice), Konstantin Gorodischenko(nice), Andrey Bazdyrev(nice), Natal\'ya Surovtseva(nice), Anatolii Khodakov(nice), Dmitry Belyaev(nice), Michael Nevski(nice), Maxim Lanin(nice), Igor Dvurekov(nice), Andrey Fedotov(nice), Grigory Ivannikov(interesting)