Tayri d yiwen usentel i yeṭṭfen amur ameqqran deg tsekla s umata ladɣa deg tmedyazt, ulac timeti i yesɛan tamedyazt ur d-tewwi ara ɣef usentel-a n tayri, ulac amedyaz ur necni ara ɣef tayri.D asentel id yufraren deg tmedyazt taqbaylit deg lqarn19 d lqarn wis 20.