-th b-p bbb bbh bbo bbp bbr bbs bbt bhb bhh bho bhp bhr bhs bht bob boh boo bop bor bos bot bpb bph bpo bpp bpr bps bpt brb brh bro brp brr brs brt bsb bsh bso bsp bsr bss bst btb bth bto btp btr bts btt hbb hbh hbo hbp hbr hbs hbt hhb hhh hho hhp hhr hhs hht hob hoh hoo hop hor hos hot hpb hph hpo hpp hpr hps hpt hr- hrb hrh hro hrp hrr hrs hrt hsb hsh hsp hsr hss hst htb hth hto htp htr hts htt ob- obb obh obo obp obr obs obt ohh oho ohp ohr ohs oht oo- oob ooh ooo oop oor oos oot op- opb oph opo opp opr ops opt or- orb orh oro orp orr ors ort os- osb osh oso osp osr oss ost ot- otb oth oto otp otr ots ott p-p pbb pbo pbp pbr pbs pbt phb pho php phr phs pht pob poh poo pop por pos pot ppb pph ppo ppp ppr pps ppt prb prh pro prp prr prs prt ps- psb psh pso psp psr pss pst pt- ptb pth pto ptp ptr pts ptt rbb rbh rbo rbp rbr rbs rbt rh- rhb rhh rho rhp rhr rhs rht rob roh roo rop ror ros rot rpb rph rpo rpp rpr rps rpt rrb rrh rrp rrr rrs rrt rsb rsh rso rsp rsr rss rst rtb rto rtp rtr rts rtt sbb sbh sbo sbp sbr sbs sbt sh- shb shh sho shp shr shs sht sob soh soo sop sor sos sot spb sph spo spp spr sps spt sr- srb srh sro srp srr srs srt ss- ssb ssh sso ssp ssr sss sst stb sth sto stp str sts stt tbb tbh tbo tbp tbr tbs tbt th- thb thh tho thp thr ths tht to- tob toh too top tor tos tot tpb tph tpo tpp tpr tps tpt trb trh tro trp trr trs trt tsb tsh tso tsp tsr tss tst ttb tth tto ttp ttr tts ttt