Ko e meʻalele fika 0 ʻi he fakatātaá ko hoʻo meʻalele. ʻOkú ke ʻi he hala ʻoku hokohoko atu ʻi ha fetaulakiʻanga T pea loto ke afe toʻomataʻu ki he hala fakatafaʻaki. ʻOku haʻu hangatonu ʻa e X kiate koe ʻi he hala ʻoku hokohoko atú. ʻOku tatali ʻa e Y mo e Z ke hū mai mei he hala fakatafaʻaki. ʻI he ʻikai ha papa pe maama, ko hai kuo pau ke ke tukuange ʻa e hala ki ai?