-th bbb bbe bbh bbi bbk bbo bbs bbt bbx be- beb bee beh bei bek beo bes bet bex bhb bhe bhh bhi bhk bho bhs bht bhx bi- bib bie bih bii bik bio bis bit bix bkb bke bkk bko bks bkt bkx bob boe boh boi bok boo bos bot box bsb bse bsh bsi bsk bso bss bst bsx btb bte bth bti btk bto bts btt btx bxb bxi bxo bxx ebb ebe ebh ebi ebk ebo ebs ebt ebx eeb eee eek eeo ees eet eex ehb ehe ehh ehi eho ehs eht eib eie eii eik eio eis eit eix ekb eke ekh eki eko eks ekt eo- eob eoe eoh eoi eok eoo eos eot es- esb ese esh esi esk eso ess est esx etb ete eth eti etk eto ets ett etx ex- exe exh exi exo exs ext exx h-i hbb hbe hbh hbi hbk hbo hbs hbt hbx he- heb hee heh hei hek heo hes het hex hhb hhe hhh hhi hhk hho hhs hht hib hie hih hii hik hio his hit hix hkb hkh hki hkk hko hks hkt hob hoe hoh hoi hok hoo hos hot hox hsb hse hsh hsi hsk hss hst hsx htb hte hth hti htk hto hts htt htx ibb ibe ibh ibi ibk ibo ibs ibt ibx ie- iee iei iek ies iet iex ihb ihe ihh ihi ihk iho ihs iht iib iie iih iii iio iis iit iix ikb ike iki ikk iko iks ikt ikx io- iob ioe ioh ioi ioo ios iot is- isb ise ish isi isk iso iss ist itb ite ith iti itk ito its itt itx ixe ixi k-t kbb kbe kbh kbi kbk kbo kbs kbx ke- keb kee keh kei kek keo kes ket kex khe khh khi khk kho khs kib kie kih kii kik kio kis kit kix kkb kke kkh kki kkk kks kkt kob koe koh koi kok koo kos kot ksb kse ksh ksi ksk kso kss kst ktb kte kth ktk kto kts ktt kxo o-i ob- obb obe obh obi obk obo obs obt obx oeb oee oeh oei oeo oes oet oex ohe ohh ohi oho ohs oht oib oie oii oik oio ois oit okb oke oki okk oko oks oo- oob ooh ooi ook ooo oos oot oox os- osb ose osh osi osk oso oss ost osx ot- otb ote oth oti otk oto ots ott ox- oxb oxi oxo oxt oxx sbb sbe sbh sbi sbk sbo sbs sbt sbx se- seb see seh sei sek seo ses set sex sh- shb she shh shi shk sho shs sht sib sie sih sii sik sio sis sit six sk- skb ske skh ski skk sko sks skt skx sob soe soh soi sok soo sos sot sox ss- ssb sse ssh ssi ssk sso sss sst ssx stb ste sth sti stk sto sts stt stx sxi sxs sxt t-x tbb tbe tbh tbi tbk tbo tbs tbt te- teb tee teh tei tek teo tes tet tex th- thb the thh thi thk tho ths tht thx tib tie tih tii tik tio tis tit tix tkb tke tkk tko tks tkt to- tob toe toh toi tok too tos tot tox tsb tse tsh tsi tsk tso tss tst tsx ttb tte tth tti ttk tto tts ttt ttx txe txi txk txs txt xbe xbx xee xes xet xex xht xie xii xio xis xit xix xkb xke xks xoi xok xoo xos xot xox xsb xsi xss xst xti xts xtx xxi xxo xxx