-th a-a a-b a-c a-t aaa aab aac aad aah aat aau ab- aba abb abc abd abh abt abu ac- aca acb acc acd ach act acu ad- ada adb adc add adh adt adu aha ahb ahc ahd ahh aht ahu at- ata atb atc atd ath att atu au- aua aub auc aud auh aut b-u baa bab bac bad bah bat bau bba bbb bbc bbd bbh bbt bbu bca bcb bcc bcd bch bct bcu bda bdb bdc bdd bdh bdt bdu bha bhb bhc bhd bhh bht bhu bta btb btc btd bth btt btu bua bub buc bud buh but buu c-- caa cab cac cad cah cat cau cba cbb cbc cbd cbh cbt cbu cca ccb ccc ccd cch cct ccu cda cdb cdc cdd cdh cdt cdu ch- cha chb chc chd chh cht chu cta ctb ctc ctd cth ctt ctu cua cub cuc cud cuh cut cuu daa dab dac dad dah dat dau dba dbb dbc dbd dbh dbt dbu dca dcb dcc dcd dct dcu dda ddb ddc ddd ddh ddt ddu dh- dha dhb dhc dhd dhh dht dhu dta dtb dtc dtd dth dtt dtu dua dub duc dud duh dut haa hab hac had hah hat hau hba hbb hbc hbd hbh hbt hbu hca hcb hcc hcd hch hct hda hdb hdc hdd hdh hdt hdu hha hhb hhc hhd hhh hht hhu hta htb htc htd hth htt hua hub huc hud huh hut huu taa tab tac tad tah tat tau tba tbb tbc tbd tbh tbt tbu tca tcb tcc tcd tch tct tcu tda tdb tdc tdd tdh tdt tdu th- tha thb thc thd thh tht thu tta ttb ttc ttd tth ttt ttu tua tub tuc tud tuh tut tuu ua- uaa uab uac uad uah uat uau uba ubb ubc ubh ubt ubu uca ucb ucc ucd uch uct ucu uda udb udc udd udt udu uha uhb uhc uhd uhh uht uhu uta utb utc utd uth utt utu uua uuc uut uuu