Di temsalt n yifyar d tseddarin nufa belli sin n leûnaf i d-yettuùalen s waîas deg wammud n yisefra-ines : Afir bu snat tseddarin(vers binaire) d wafir bu tlata tseddarin (vers ternaire). Acukan tuget n yisefra-s ttwabnan ùef wafer-agi bu tlata tseddarin, ayen icuban ifyar di tmedyazt n Si Muhand u Mhend.