 Haddaba hadaan u noqonno tusaalaha kor ku xusan, waxaan aragnaa in: taxanaha b uu leeyahay addimo ah: 3×1; kan t 2×2; kan j 1×4; kan x uu leeyahay 2×4 sidaas oo kale taxanihii ah heerka m×n wuxuu ka kooban yahay taxanayaal ah m-dhinactax iyo taxanayaal ah n-joogtax. 