a-a a-b a-t aaa aab aak aas aat aau ab- aba abb abk abs abt abu aka akb akk aks aku as- asa asb ask ass ast asu at- ata atb ats att atu au- aua aub auk aus aut b-u baa bab bak bas bat bau bba bbb bbk bbs bbt bbu bka bkb bkk bks bkt bsa bsb bsk bss bst bsu bta btb btk bts btt btu bua bub buk bus but buu k-t ka- kaa kab kak kas kat kau kba kbb kbk kbs kbu kkb kkk kks kkt kku ksa ksb ksk kss kst ksu kta ktb ktk kts ktt ktu kub kuk kus kut kuu saa sab sak sas sat sau sba sbb sbk sbs sbt sbu sk- ska skb skk sks skt sku ss- ssa ssb ssk sss sst ssu sta stb stk sts stt stu sua sub suk sus sut suu taa tab tak tas tat tau tba tbb tbk tbs tbt tbu tka tkb tkk tks tkt tsa tsb tsk tss tst tsu tta ttb ttk tts ttt ttu tua tub tuk tus tut tuu ua- uaa uab uak uas uat uau uba ubb ubk ubs ubt ubu uka ukb ukk uku usa usb usk uss ust usu uta utb utk uts utt utu uua uus uut uuu