-th a-a a-b a-c a-t aaa aab aac aah aao aat aau ab- aba abb abc abh abo abt abu ac- aca acb acc ach aco act acu aha ahb ahc ahh aho aht ahu aoa aob aoc aoh aoo aot aou at- ata atb atc ath ato att atu au- aua aub auc auh auo aut b-u baa bab bac bah bao bat bau bba bbb bbc bbh bbo bbt bbu bca bcb bcc bch bco bct bcu bha bhb bhc bhh bho bht bhu boa bob boc boh boo bot bou bta btb btc bth bto btt btu bua bub buc buh buo but buu c-- caa cab cac cah cao cat cau cba cbb cbc cbh cbo cbt cbu cca ccb ccc cch cco cct ccu ch- cha chb chc chh cho cht chu co- coa cob coc coh coo cot cou cta ctb ctc cth cto ctt ctu cua cub cuc cuh cuo cut cuu haa hab hac hah hao hat hau hba hbb hbc hbh hbo hbt hbu hca hcb hcc hch hco hct hha hhb hhc hhh hho hht hhu hoa hob hoc hoh hoo hot hou hta htb htc hth hto htt hua hub huc huh huo hut huu oaa oab oac oah oao oat oau ob- oba obb obc obh obo obt obu oc- oca ocb occ och oco oct ocu oha ohc ohh oho oht ohu oo- ooa oob ooc ooh ooo oot ot- ota otb otc oth oto ott otu ou- oua ouc ouh ouo out taa tab tac tah tao tat tau tba tbb tbc tbh tbo tbt tbu tca tcb tcc tch tco tct tcu th- tha thb thc thh tho tht thu to- toa tob toc toh too tot tou tta ttb ttc tth tto ttt ttu tua tub tuc tuh tuo tut tuu ua- uaa uab uac uah uao uat uau uba ubb ubc ubh ubo ubt ubu uca ucb ucc uch uco uct ucu uha uhb uhc uhh uho uht uhu uoa uob uoc uoo uot uta utb utc uth uto utt utu uua uuc uut uuu