-th bbb bbh bbi bbo bbs bbt bbx bhb bhh bhi bho bhs bht bhx bi- bib bih bii bio bis bit bix bob boh boi boo bos bot box bsb bsh bsi bso bss bst bsx btb bth bti bto bts btt btx bxb bxi bxo bxx h-i hbb hbh hbi hbo hbs hbt hbx hhb hhh hhi hho hhs hht hib hih hii hio his hit hix hob hoh hoi hoo hos hot hox hsb hsh hsi hss hst hsx htb hth hti hto hts htt htx ibb ibh ibi ibo ibs ibt ibx ihb ihh ihi iho ihs iht iib iih iii iio iis iit iix io- iob ioh ioi ioo ios iot is- isb ish isi iso iss ist itb ith iti ito its itt itx ixi o-i ob- obb obh obi obo obs obt obx ohh ohi oho ohs oht oib oii oio ois oit oo- oob ooh ooi ooo oos oot oox os- osb osh osi oso oss ost osx ot- otb oth oti oto ots ott ox- oxb oxi oxo oxt oxx sbb sbh sbi sbo sbs sbt sbx sh- shb shh shi sho shs sht sib sih sii sio sis sit six sob soh soi soo sos sot sox ss- ssb ssh ssi sso sss sst ssx stb sth sti sto sts stt stx sxi sxs sxt t-x tbb tbh tbi tbo tbs tbt th- thb thh thi tho ths tht thx tib tih tii tio tis tit tix to- tob toh toi too tos tot tox tsb tsh tsi tso tss tst tsx ttb tth tti tto tts ttt ttx txi txs txt xbx xht xii xio xis xit xix xoi xoo xos xot xox xsb xsi xss xst xti xts xtx xxi xxo xxx