a-a a-b a-i aaa aab aai aak aau ab- aba abb abi abk abu ai- aia aib aii aik aiu aka akb aki akk aku au- aua aub aui auk b-u baa bab bai bak bau bba bbb bbi bbk bbu bi- bia bib bii bik biu bka bkb bkk bua bub bui buk buu ia- iaa iab iai iau iba ibb ibi ibk ibu iia iib iii iiu ika ikb iki ikk iku iu- iua iub iui ka- kaa kab kai kak kau kba kbb kbi kbk kbu kia kib kii kik kiu kkb kki kkk kku kub kui kuk kuu ua- uaa uab uai uak uau uba ubb ubi ubk ubu uia uib uii uiu uka ukb uki ukk uku uua uuu