D talɣa i d-yeskanen tigawt teḍra ɣef umigaw, yettili-d s tmerna n tecreḍt (ttw) ɣer tazwara n umyag aḥerfi,maca nezmer daɣen ad nessileɣ attwaɣ s tmerna n ( m, mm) neɣ ( n, nn) , yettaleɣ s umur ameqqran n yemyagen s tmerna n uzwir <<tt>>. NAIT ZERRAD.K,yenna-d: << Attwaɣ yettaleɣ s usezwer n (ttu,twa,t, mm(e), n neɣ nn (e).>>31