nine o'clock
You should sleep in your bed , undressed . '' And as usual he began slowly and emphatically saying what everybody knew . Nikitin 's first lesson was on Russian language in the second class . When at nine o'clock punctually he went into the classroom , he saw written on the blackboard two large letters -- _ M. S. _ That , no doubt , meant Masha Shelestov . `` They 've scented it out already , the rascals ... '' thought Nikitin . `` How is it they know everything ? '' The second lesson was in the fifth class .