-th a-a a-b a-c a-t aaa aab aac aah aao aap aat ab- aba abb abc abh abo abp abt ac- aca acb acc ach aco acp act aha ahb ahc ahh aho ahp aht aoa aob aoc aoh aoo aop aot ap- apa apb apc aph apo app apt at- ata atb atc ath ato atp att b-p baa bab bac bah bao bap bat bba bbb bbc bbh bbo bbp bbt bca bcb bcc bch bco bcp bct bha bhb bhc bhh bho bhp bht boa bob boc boh boo bop bot bpa bpb bpc bph bpo bpp bpt bta btb btc bth bto btp btt c-- caa cab cac cah cao cap cat cba cbb cbc cbh cbo cbp cbt cca ccb ccc cch cco ccp cct ch- cha chb chc chh cho chp cht co- coa cob coc coh coo cop cot cpa cpb cpc cph cpo cpp cpt cta ctb ctc cth cto ctp ctt haa hab hac hah hao hap hat hba hbb hbc hbh hbo hbp hbt hca hcb hcc hch hco hcp hct hha hhb hhc hhh hho hhp hht hoa hob hoc hoh hoo hop hot hpa hpb hpc hph hpo hpp hpt hta htb htc hth hto htp htt oaa oab oac oah oao oap oat ob- oba obb obc obh obo obp obt oc- oca ocb occ och oco ocp oct oha ohc ohh oho ohp oht oo- ooa oob ooc ooh ooo oop oot op- opa opb opc oph opo opp opt ot- ota otb otc oth oto otp ott p-p paa pab pac pah pao pap pat pba pbb pbc pbo pbp pbt pca pcb pcc pch pco pcp pct pha phb phc pho php pht poa pob poc poh poo pop pot ppa ppb ppc pph ppo ppp ppt pt- pta ptb ptc pth pto ptp ptt taa tab tac tah tao tap tat tba tbb tbc tbh tbo tbp tbt tca tcb tcc tch tco tcp tct th- tha thb thc thh tho thp tht to- toa tob toc toh too top tot tpa tpb tpc tph tpo tpp tpt tta ttb ttc tth tto ttp ttt