D aferdis seg yiferdisen n usefru, d agraw n yifyar yedduklen ilmend n tmeɣrut d tudsa n wakaten, Dessons.G yenna-ad:  taseddart d tugget n yifyar ttwassegmen ilmend n tmaɣrut21, ma ɣer Salhi.M.A:  d taggayt n yifyar yedduklen ama s tmeɣrut ama s tuddsa n wakat, akken daɣen, yezmer d asentel ara ten-isdukklen.