-th a-a a-b a-c a-t aaa aab aac aah aao aap aar aat ab- aba abb abc abh abo abp abr abt ac- aca acb acc ach aco acp acr act aha ahb ahc ahh aho ahp ahr aht aoa aob aoc aoh aoo aop aor aot ap- apa apb apc aph apo app apr apt ar- ara arb arc arh aro arp arr art at- ata atb atc ath ato atp atr att b-p baa bab bac bah bao bap bar bat bba bbb bbc bbh bbo bbp bbr bbt bca bcb bcc bch bco bcp bcr bct bha bhb bhc bhh bho bhp bhr bht boa bob boc boh boo bop bor bot bpa bpb bpc bph bpo bpp bpr bpt bra brb brh bro brp brr brt bta btb btc bth bto btp btr btt c-- caa cab cac cah cao cap car cat cba cbb cbc cbh cbo cbp cbr cbt cca ccb ccc cch cco ccp ccr cct ch- cha chb chc chh cho chp chr cht co- coa cob coc coh coo cop cor cot cpa cpb cpc cph cpo cpp cpr cpt cra crb crc crh cro crp crr crt cta ctb ctc cth cto ctp ctr ctt haa hab hac hah hao hap har hat hba hbb hbc hbh hbo hbp hbr hbt hca hcb hcc hch hco hcp hcr hct hha hhb hhc hhh hho hhp hhr hht hoa hob hoc hoh hoo hop hor hot hpa hpb hpc hph hpo hpp hpr hpt hr- hra hrb hrc hrh hro hrp hrr hrt hta htb htc hth hto htp htr htt oaa oab oac oah oao oap oar oat ob- oba obb obc obh obo obp obr obt oc- oca ocb occ och oco ocp ocr oct oha ohc ohh oho ohp ohr oht oo- ooa oob ooc ooh ooo oop oor oot op- opa opb opc oph opo opp opr opt or- ora orb orc orh oro orp orr ort ot- ota otb otc oth oto otp otr ott p-p paa pab pac pah pao pap par pat pba pbb pbc pbo pbp pbr pbt pca pcb pcc pch pco pcp pcr pct pha phb phc pho php phr pht poa pob poc poh poo pop por pot ppa ppb ppc pph ppo ppp ppr ppt pra prb prc prh pro prp prr prt pt- pta ptb ptc pth pto ptp ptr ptt ra- raa rab rac rah rao rap rar rat rba rbb rbc rbh rbo rbp rbr rbt rca rcb rcc rch rco rcp rcr rct rh- rha rhb rhc rhh rho rhp rhr rht roa rob roc roh roo rop ror rot rpa rpb rpc rph rpo rpp rpr rpt rra rrb rrc rrh rrp rrr rrt rta rtb rtc rto rtp rtr rtt taa tab tac tah tao tap tar tat tba tbb tbc tbh tbo tbp tbr tbt tca tcb tcc tch tco tcp tcr tct th- tha thb thc thh tho thp thr tht to- toa tob toc toh too top tor tot tpa tpb tpc tph tpo tpp tpr tpt tra trb trc trh tro trp trr trt tta ttb ttc tth tto ttp ttr ttt