Imyigawanen deg tenfaliyin-nsen ssxedmen takriṭ, seg-s nufa-d aɣrud n teggiyin n waggaz azal n 10, imyigawanen ssxedmen kra seg-sen; azawar akked asqecmeɛ nufa-d yal yiwen yettusemres 03 n tikkwal s ufmiḍi 30%, asezɣen n tigawt nufa-d 02 afmiḍi-is 20%, asezɣen n ubeddel n rray d ukellex ttusemrasen yiwet n tikkelt 01 s ufmiḍi 10% ma tiggit n usezɣen, amuyed d tsedrest ur tent-ssxedmen ara afmiḍi-nsent 0%.