Muaj 6 cov kab ntau lawm hauv yias qaij ua haujlwm: kev kub ceev dome kab, kev kub ceev yias qaij lub taub hau kab,
hnyav ua yias qaij lub taub hau kab, lub koob yees duab vaj tsev kab, tawg-pov thawj ptz lub koob yees duab kab, tag nrho hauv ib qho ptz koob yees duab kab.
