-er -th bbb bbe bbf bbh bbk bbn bbo bbr bbs bbt be- beb bee bef beh bek ben beo ber bes bet bfb bfe bff bfh bfn bfo bfr bfs bft bhb bhe bhf bhh bhk bho bhr bhs bht bkb bke bkf bkk bkn bko bkr bks bkt bnb bne bnf bnk bnn bno bnr bns bnt bob boe bof boh bok bon boo bor bos bot brb bre brf brh brk brn bro brr brs brt bsb bse bsf bsh bsk bsn bso bsr bss bst btb bte btf bth btk btn bto btr bts btt ebb ebe ebf ebh ebk ebn ebo ebr ebs ebt eeb eee eef eek een eeo eer ees eet ef- efb efe eff efh efo efr efs eft ehb ehe ehf ehh ehn eho ehr ehs eht ekb eke ekf ekh eko ekr eks ekt en- enb ene enf enh enk enn eno enr ens ent eo- eob eoe eof eoh eok eon eoo eor eos eot erb ere erf erh erk ern ero err ers ert es- esb ese esf esh esk esn eso esr ess est etb ete etf eth etk etn eto etr ets ett fbb fbe fbf fbh fbk fbn fbo fbr fbs fbt feb fee fef feh fek fen feo fer fes fet ffe fff ffh ffk ffn ffo ffr ffs fft fhb fhe fhf fhh fhn fho fhr fhs fkb fkf fkk fkt fnb fne fnf fnh fnk fnn fnr fns fnt fob foe fof foh fok fon foo for fos fot frb fre frf frh frk frn fro frr frs frt fsb fse fsf fsh fsk fsn fso fsr fss fst ftb fte ftf fth ftk ftn fto ftr fts ftt hbb hbe hbf hbh hbk hbn hbo hbr hbs hbt he- heb hee hef heh hek hen heo her hes het hfb hfe hff hfh hfk hfn hfo hfr hfs hft hhb hhe hhf hhh hhk hhn hho hhr hhs hht hkb hkf hkh hkk hkn hko hkr hks hkt hnb hne hnf hnh hnk hnn hno hns hnt hob hoe hof hoh hok hon hoo hor hos hot hr- hrb hre hrf hrh hrk hrn hro hrr hrs hrt hsb hse hsf hsh hsk hsn hsr hss hst htb hte htf hth htk htn hto htr hts htt k-t kbb kbe kbf kbh kbk kbn kbo kbr kbs ke- keb kee kef keh kek ken keo ker kes ket kff kfh kfo kfs khe khf khh khk khn kho khr khs kkb kke kkh kkk kkn kkr kks kkt kn- kne knf knk knn kno knr knt kob koe kof koh kok kon koo kor kos kot krf krk krn kro krr krs krt ksb kse ksf ksh ksk ksn kso ksr kss kst ktb kte ktf kth ktk ktn kto ktr kts ktt nbb nbe nbf nbk nbn nbo nbr nbs nbt ne- neb nee nef neh nek nen neo ner nes net nfb nfe nff nfk nfn nfo nfr nfs nft nhb nhe nhf nhh nhk nhn nhr nhs nht nke nkf nkk nkn nko nkr nks nkt nnb nne nnf nnh nnk nnn nno nns nnt no- nob noe nof noh nok non noo nor nos not nrb nre nrf nrk nrn nro nrr nrs nrt nsb nse nsf nsh nsk nsn nso nsr nss nst ntb nte ntf nth ntk ntn nto ntr nts ntt ob- obb obe obf obh obk obn obo obr obs obt oeb oee oef oeh oen oeo oer oes oet of- ofb ofe off ofn ofo ofr ofs oft ohe ohf ohh ohn oho ohr ohs oht okb oke okk oko okr oks on- onb one onf onh onk onn ono onr ons ont oo- oob oof ooh ook oon ooo oor oos oot or- orb ore orf orh ork orn oro orr ors ort os- osb ose osf osh osk osn oso osr oss ost ot- otb ote otf oth otk otn oto otr ots ott rbb rbe rbf rbh rbk rbn rbo rbr rbs rbt re- reb ree ref reh rek ren reo rer res ret rfb rfe rff rfh rfk rfn rfo rfr rfs rft rh- rhb rhe rhf rhh rhn rho rhr rhs rht rkb rke rkf rkk rko rks rkt rnb rnh rnn rno rnr rns rnt rob roe rof roh rok ron roo ror ros rot rrb rrf rrh rrk rrn rrr rrs rrt rsb rse rsf rsh rsk rsn rso rsr rss rst rtb rte rtf rtk rtn rto rtr rts rtt sbb sbe sbf sbh sbk sbn sbo sbr sbs sbt se- seb see sef seh sek sen seo ser ses set sfb sfe sff sfh sfk sfn sfo sfr sfs sft sh- shb she shf shh shk shn sho shr shs sht sk- skb ske skf skh skk sko skr sks skt snb sne snf snk snn sno snr sns snt sob soe sof soh sok son soo sor sos sot sr- srb sre srf srh srk srn sro srr srs srt ss- ssb sse ssf ssh ssk ssn sso ssr sss sst stb ste stf sth stk stn sto str sts stt tbb tbe tbf tbh tbk tbn tbo tbr tbs tbt te- teb tee tef teh tek ten teo ter tes tet tfb tfe tff tfh tfk tfn tfo tfr tfs tft th- thb the thf thh thk thn tho thr ths tht tkb tke tkk tko tkr tks tkt tnb tne tnf tnh tnk tnn tno tnr tns tnt to- tob toe tof toh tok ton too tor tos tot trb tre trf trh trk trn tro trr trs trt tsb tse tsf tsh tsk tsn tso tsr tss tst ttb tte ttf tth ttk ttn tto ttr tts ttt