-th b-p bbb bbh bbo bbp bbt bbx bhb bhh bho bhp bht bhx bob boh boo bop bot box bpb bph bpo bpp bpt bpx btb bth bto btp btt btx bxb bxo bxx hbb hbh hbo hbp hbt hbx hhb hhh hho hhp hht hob hoh hoo hop hot hox hpb hph hpo hpp hpt htb hth hto htp htt htx ob- obb obh obo obp obt obx ohh oho ohp oht oo- oob ooh ooo oop oot oox op- opb oph opo opp opt opx ot- otb oth oto otp ott ox- oxb oxo oxt oxx p-p pbb pbo pbp pbt pbx phb pho php pht phx pob poh poo pop pot pox ppb pph ppo ppp ppt ppx pt- ptb pth pto ptp ptt ptx pxt t-x tbb tbh tbo tbp tbt th- thb thh tho thp tht thx to- tob toh too top tot tox tpb tph tpo tpp tpt tpx ttb tth tto ttp ttt ttx txt xbx xhp xht xoo xop xot xox xpb xpo xpp xpt xtp xtx xxo xxp xxx