-th b-p bbb bbh bbo bbp bbs bbt bhb bhh bho bhp bhs bht bob boh boo bop bos bot bpb bph bpo bpp bps bpt bsb bsh bso bsp bss bst btb bth bto btp bts btt hbb hbh hbo hbp hbs hbt hhb hhh hho hhp hhs hht hob hoh hoo hop hos hot hpb hph hpo hpp hps hpt hsb hsh hsp hss hst htb hth hto htp hts htt ob- obb obh obo obp obs obt ohh oho ohp ohs oht oo- oob ooh ooo oop oos oot op- opb oph opo opp ops opt os- osb osh oso osp oss ost ot- otb oth oto otp ots ott p-p pbb pbo pbp pbs pbt phb pho php phs pht pob poh poo pop pos pot ppb pph ppo ppp pps ppt ps- psb psh pso psp pss pst pt- ptb pth pto ptp pts ptt sbb sbh sbo sbp sbs sbt sh- shb shh sho shp shs sht sob soh soo sop sos sot spb sph spo spp sps spt ss- ssb ssh sso ssp sss sst stb sth sto stp sts stt tbb tbh tbo tbp tbs tbt th- thb thh tho thp ths tht to- tob toh too top tos tot tpb tph tpo tpp tps tpt tsb tsh tso tsp tss tst ttb tth tto ttp tts ttt