-er bbb bbe bbh bbi bbk bbo bbr bbs be- beb bee beh bei bek beo ber bes bhb bhe bhh bhi bhk bho bhr bhs bi- bib bie bih bii bik bio bir bis bkb bke bkk bko bkr bks bob boe boh boi bok boo bor bos brb bre brh bri brk bro brr brs bsb bse bsh bsi bsk bso bsr bss ebb ebe ebh ebi ebk ebo ebr ebs eeb eee eek eeo eer ees ehb ehe ehh ehi eho ehr ehs eib eie eii eik eio eir eis ekb eke ekh eki eko ekr eks eo- eob eoe eoh eoi eok eoo eor eos erb ere erh eri erk ero err ers es- esb ese esh esi esk eso esr ess h-i hbb hbe hbh hbi hbk hbo hbr hbs he- heb hee heh hei hek heo her hes hhb hhe hhh hhi hhk hho hhr hhs hib hie hih hii hik hio hir his hkb hkh hki hkk hko hkr hks hob hoe hoh hoi hok hoo hor hos hr- hrb hre hrh hri hrk hro hrr hrs hsb hse hsh hsi hsk hsr hss ibb ibe ibh ibi ibk ibo ibr ibs ie- iee iei iek ier ies ihb ihe ihh ihi ihk iho ihr ihs iib iie iih iii iio iir iis ikb ike iki ikk iko ikr iks io- iob ioe ioh ioi ioo ior ios ir- irb ire iri irk iro irr irs is- isb ise ish isi isk iso isr iss kbb kbe kbh kbi kbk kbo kbr kbs ke- keb kee keh kei kek keo ker kes khe khh khi khk kho khr khs kib kie kih kii kik kio kir kis kkb kke kkh kki kkk kkr kks kob koe koh koi kok koo kor kos kri krk kro krr krs ksb kse ksh ksi ksk kso ksr kss o-i ob- obb obe obh obi obk obo obr obs oeb oee oeh oei oeo oer oes ohe ohh ohi oho ohr ohs oib oie oii oik oio oir ois okb oke oki okk oko okr oks oo- oob ooh ooi ook ooo oor oos or- orb ore orh ori ork oro orr ors os- osb ose osh osi osk oso osr oss rbb rbe rbh rbi rbk rbo rbr rbs re- reb ree reh rei rek reo rer res rh- rhb rhe rhh rhi rho rhr rhs rib rie rih rii rik rio rir ris rkb rke rkk rko rks rob roe roh roi rok roo ror ros rrb rrh rri rrk rrr rrs rsb rse rsh rsi rsk rso rsr rss sbb sbe sbh sbi sbk sbo sbr sbs se- seb see seh sei sek seo ser ses sh- shb she shh shi shk sho shr shs sib sie sih sii sik sio sir sis sk- skb ske skh ski skk sko skr sks sob soe soh soi sok soo sor sos sr- srb sre srh sri srk sro srr srs ss- ssb sse ssh ssi ssk sso ssr sss