Всеки човек е уникален и така са нашите нужди за сън. Но в днешния зает свят, колко сън трябва да спим всяка нощ..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Петнадесет на осемнайсет от 14 до 15 Единадесет на тринадесет. от 9 до 11