Amḍan n tṣeddarin daɣen ur yeɛdil ara seg usefru ɣer wayeḍ51. Deg wammud-agi, taɣessa n tmeɣrut temxallaf seg tṣeddart ɣer tayeḍ. Tikkelt, ad naf lqaleb n tmeɣrut (A/A, A/A), tikkelt (A/B, A/B), tikkelt nniḍen ad naf yessexdem (A/A/B), (A/B/C), (A/B/B), akken daɣen tikwal, yessexdam ugar n yiwen n lqaleb deg yiwen n usefru.