-th a-a a-b a-t aaa aab aah aao aap aar aat ab- aba abb abh abo abp abr abt aha ahb ahh aho ahp ahr aht aoa aob aoh aoo aop aor aot ap- apa apb aph apo app apr apt ar- ara arb arh aro arp arr art at- ata atb ath ato atp atr att b-p baa bab bah bao bap bar bat bba bbb bbh bbo bbp bbr bbt bha bhb bhh bho bhp bhr bht boa bob boh boo bop bor bot bpa bpb bph bpo bpp bpr bpt bra brb brh bro brp brr brt bta btb bth bto btp btr btt haa hab hah hao hap har hat hba hbb hbh hbo hbp hbr hbt hha hhb hhh hho hhp hhr hht hoa hob hoh hoo hop hor hot hpa hpb hph hpo hpp hpr hpt hr- hra hrb hrh hro hrp hrr hrt hta htb hth hto htp htr htt oaa oab oah oao oap oar oat ob- oba obb obh obo obp obr obt oha ohh oho ohp ohr oht oo- ooa oob ooh ooo oop oor oot op- opa opb oph opo opp opr opt or- ora orb orh oro orp orr ort ot- ota otb oth oto otp otr ott p-p paa pab pah pao pap par pat pba pbb pbo pbp pbr pbt pha phb pho php phr pht poa pob poh poo pop por pot ppa ppb pph ppo ppp ppr ppt pra prb prh pro prp prr prt pt- pta ptb pth pto ptp ptr ptt ra- raa rab rah rao rap rar rat rba rbb rbh rbo rbp rbr rbt rh- rha rhb rhh rho rhp rhr rht roa rob roh roo rop ror rot rpa rpb rph rpo rpp rpr rpt rra rrb rrh rrp rrr rrt rta rtb rto rtp rtr rtt taa tab tah tao tap tar tat tba tbb tbh tbo tbp tbr tbt th- tha thb thh tho thp thr tht to- toa tob toh too top tor tot tpa tpb tph tpo tpp tpr tpt tra trb trh tro trp trr trt tta ttb tth tto ttp ttr ttt