-th a-a a-b a-t aaa aab aah aao aap aas aat ab- aba abb abh abo abp abs abt aha ahb ahh aho ahp ahs aht aoa aob aoh aoo aop aos aot ap- apa apb aph apo app aps apt as- asa asb ash aso asp ass ast at- ata atb ath ato atp ats att b-p baa bab bah bao bap bas bat bba bbb bbh bbo bbp bbs bbt bha bhb bhh bho bhp bhs bht boa bob boh boo bop bos bot bpa bpb bph bpo bpp bps bpt bsa bsb bsh bso bsp bss bst bta btb bth bto btp bts btt haa hab hah hao hap has hat hba hbb hbh hbo hbp hbs hbt hha hhb hhh hho hhp hhs hht hoa hob hoh hoo hop hos hot hpa hpb hph hpo hpp hps hpt hsa hsb hsh hsp hss hst hta htb hth hto htp hts htt oaa oab oah oao oap oas oat ob- oba obb obh obo obp obs obt oha ohh oho ohp ohs oht oo- ooa oob ooh ooo oop oos oot op- opa opb oph opo opp ops opt os- osa osb osh oso osp oss ost ot- ota otb oth oto otp ots ott p-p paa pab pah pao pap pas pat pba pbb pbo pbp pbs pbt pha phb pho php phs pht poa pob poh poo pop pos pot ppa ppb pph ppo ppp pps ppt ps- psa psb psh pso psp pss pst pt- pta ptb pth pto ptp pts ptt saa sab sah sao sap sas sat sba sbb sbh sbo sbp sbs sbt sh- sha shb shh sho shp shs sht soa sob soh soo sop sos sot spa spb sph spo spp sps spt ss- ssa ssb ssh sso ssp sss sst sta stb sth sto stp sts stt taa tab tah tao tap tas tat tba tbb tbh tbo tbp tbs tbt th- tha thb thh tho thp ths tht to- toa tob toh too top tos tot tpa tpb tph tpo tpp tps tpt tsa tsb tsh tso tsp tss tst tta ttb tth tto ttp tts ttt