b-p bbb bbe bbf bbh bbi bbk bbo bbp bbs be- beb bee bef beh bei bek beo bep bes bfb bfe bff bfh bfi bfo bfp bfs bhb bhe bhf bhh bhi bhk bho bhp bhs bi- bib bie bif bih bii bik bio bip bis bkb bke bkf bkk bko bkp bks bob boe bof boh boi bok boo bop bos bpb bpe bpf bph bpi bpo bpp bps bsb bse bsf bsh bsi bsk bso bsp bss ebb ebe ebf ebh ebi ebk ebo ebp ebs eeb eee eef eek eeo eep ees ef- efb efe eff efh efi efo efp efs ehb ehe ehf ehh ehi eho ehp ehs eib eie eif eii eik eio eip eis ekb eke ekf ekh eki eko ekp eks eo- eob eoe eof eoh eoi eok eoo eop eos ep- epb epe epf eph epi epo epp eps es- esb ese esf esh esi esk eso esp ess fbb fbe fbf fbh fbi fbk fbo fbp fbs feb fee fef feh fei fek feo fep fes ffe fff ffh ffi ffk ffo ffp ffs fhb fhe fhf fhh fhi fho fhp fhs fib fie fif fih fii fik fip fis fkb fkf fki fkk fkp fob foe fof foh foi fok foo fop fos fpb fpe fph fpi fpk fpo fpp fps fsb fse fsf fsh fsi fsk fso fsp fss h-i hbb hbe hbf hbh hbi hbk hbo hbp hbs he- heb hee hef heh hei hek heo hep hes hfb hfe hff hfh hfi hfk hfo hfp hfs hhb hhe hhf hhh hhi hhk hho hhp hhs hib hie hif hih hii hik hio hip his hkb hkf hkh hki hkk hko hkp hks hob hoe hof hoh hoi hok hoo hop hos hpb hpe hpf hph hpi hpk hpo hpp hps hsb hse hsf hsh hsi hsk hsp hss i-f ibb ibe ibf ibh ibi ibk ibo ibp ibs ie- iee ief iei iek iep ies ifb ife iff ifi ifo ifp ifs ihb ihe ihf ihh ihi ihk iho ihp ihs iib iie iif iih iii iio iip iis ikb ike ikf iki ikk iko iks io- iob ioe iof ioh ioi ioo iop ios ipb ipe ipf ipi ipo ipp ips is- isb ise isf ish isi isk iso isp iss kbb kbe kbf kbh kbi kbk kbo kbp kbs ke- keb kee kef keh kei kek keo kep kes kff kfh kfi kfo kfs khe khf khh khi khk kho khs kib kie kif kih kii kik kio kip kis kkb kke kkh kki kkk kkp kks kob koe kof koh koi kok koo kop kos kpe kpf kph kpi kpk kpo kpp kps ksb kse ksf ksh ksi ksk kso ksp kss o-i ob- obb obe obf obh obi obk obo obp obs oeb oee oef oeh oei oeo oep oes of- ofb ofe off ofi ofo ofp ofs ohe ohf ohh ohi oho ohp ohs oib oie oif oii oik oio oip ois okb oke oki okk oko okp oks oo- oob oof ooh ooi ook ooo oop oos op- opb ope opf oph opi opk opo opp ops os- osb ose osf osh osi osk oso osp oss p-p pbb pbe pbf pbi pbk pbo pbp pbs peb pee pef peh pei pek peo pep pes pfb pfe pff pfi pfk pfo pfp pfs phb phe phf phi phk pho php phs pib pie pif pih pii pik pio pip pis pkb pke pkf pki pko pkp pks pob poe pof poh poi pok poo pop pos ppb ppe ppf pph ppi ppk ppo ppp pps ps- psb pse psf psh psi psk pso psp pss sbb sbe sbf sbh sbi sbk sbo sbp sbs se- seb see sef seh sei sek seo sep ses sfb sfe sff sfh sfi sfk sfo sfp sfs sh- shb she shf shh shi shk sho shp shs sib sie sif sih sii sik sio sip sis sk- skb ske skf skh ski skk sko skp sks sob soe sof soh soi sok soo sop sos spb spe spf sph spi spk spo spp sps ss- ssb sse ssf ssh ssi ssk sso ssp sss