Kukho rhoqo abathengi abangakwaziyo ukuphumelela ngempumelelo iskena sabo kuba bengafumani inombolo ye-S / n okanye ikhowudi yelayisensi.
Iingcebiso kulo mbandela ziya kukufundisa indlela yokukhawuleza isebenze ngokukhawuleza. Cofa kwimifanekiso ukuze ufunde ngakumbi.