-er -th b-u bbb bbc bbe bbf bbh bbk bbo bbr bbs bbt bbu bcb bcc bce bcf bch bck bco bcr bcs bct bcu be- beb bec bee bef beh bek beo ber bes bet beu bfb bfc bfe bff bfh bfo bfr bfs bft bfu bhb bhc bhe bhf bhh bhk bho bhr bhs bht bhu bkb bkc bke bkf bkk bko bkr bks bkt bob boc boe bof boh bok boo bor bos bot bou brb bre brf brh brk bro brr brs brt bru bsb bsc bse bsf bsh bsk bso bsr bss bst bsu btb btc bte btf bth btk bto btr bts btt btu bub buc bue buf buh buk buo bur bus but buu c-- cbb cbc cbe cbf cbh cbk cbo cbr cbs cbt cbu ccb ccc cce ccf cch cck cco ccr ccs cct ccu ce- ceb cec cee cef ceh cek ceo cer ces cet ceu cfb cfc cfe cff cfh cfk cfo cfr cfs cft cfu ch- chb chc che chf chh chk cho chr chs cht chu ckb ckc ckh cko cks ckt co- cob coc coe cof coh cok coo cor cos cot cou crb crc cre crf crh crk cro crr crs crt cru csb csc cse csf csh csk cso csr css cst csu ctb ctc cte ctf cth ctk cto ctr cts ctt ctu cub cuc cue cuf cuh cuk cuo cur cus cut cuu ebb ebc ebe ebf ebh ebk ebo ebr ebs ebt ebu ec- ecb ecc ece ecf ech eck eco ecr ecs ect ecu eeb eec eee eef eek eeo eer ees eet ef- efb efc efe eff efh efo efr efs eft ehb ehc ehe ehf ehh eho ehr ehs eht ehu ekb ekc eke ekf ekh eko ekr eks ekt eku eo- eob eoc eoe eof eoh eok eoo eor eos eot eou erb erc ere erf erh erk ero err ers ert eru es- esb esc ese esf esh esk eso esr ess est esu etb etc ete etf eth etk eto etr ets ett etu eu- eub euc eue euf eur eus eut fbb fbc fbe fbf fbh fbk fbo fbr fbs fbt fbu fcb fcc fce fcf fck fco fcr fcs fct fcu feb fec fee fef feh fek feo fer fes fet feu ffc ffe fff ffh ffk ffo ffr ffs fft ffu fhb fhc fhe fhf fhh fho fhr fhs fkb fkc fkf fkk fkt fob foc foe fof foh fok foo for fos fot fou frb frc fre frf frh frk fro frr frs frt fru fsb fsc fse fsf fsh fsk fso fsr fss fst fsu ftb ftc fte ftf fth ftk fto ftr fts ftt ftu fub fue fuf fuk fuo fur fus fut fuu hbb hbc hbe hbf hbh hbk hbo hbr hbs hbt hbu hcb hcc hce hcf hch hck hco hcr hcs hct he- heb hec hee hef heh hek heo her hes het heu hfb hfc hfe hff hfh hfk hfo hfr hfs hft hfu hhb hhc hhe hhf hhh hhk hho hhr hhs hht hhu hkb hkf hkh hkk hko hkr hks hkt hku hob hoc hoe hof hoh hok hoo hor hos hot hou hr- hrb hrc hre hrf hrh hrk hro hrr hrs hrt hru hsb hsc hse hsf hsh hsk hsr hss hst hsu htb htc hte htf hth htk hto htr hts htt hub huc hue huf huh huk huo hur hus hut huu k-t kbb kbc kbe kbf kbh kbk kbo kbr kbs kbu kcb kcc kce kch kck kcr kcs kct kcu ke- keb kec kee kef keh kek keo ker kes ket kfc kff kfh kfo kfs kfu khe khf khh khk kho khr khs khu kkb kkc kke kkh kkk kkr kks kkt kku kob koc koe kof koh kok koo kor kos kot kou krc krf krk kro krr krs krt kru ksb ksc kse ksf ksh ksk kso ksr kss kst ksu ktb ktc kte ktf kth ktk kto ktr kts ktt ktu kub kuc kue kuh kuk kur kus kut kuu ob- obb obc obe obf obh obk obo obr obs obt obu oc- ocb occ ocf och ock oco ocr ocs oct ocu oeb oec oee oef oeh oeo oer oes oet of- ofb ofc ofe off ofo ofr ofs oft ofu ohc ohe ohf ohh oho ohr ohs oht ohu okb okc oke okk oko okr oks oku oo- oob ooc oof ooh ook ooo oor oos oot or- orb orc ore orf orh ork oro orr ors ort oru os- osb osc ose osf osh osk oso osr oss ost osu ot- otb otc ote otf oth otk oto otr ots ott otu ou- ouc oue ouf ouh ouk ouo our ous out rbb rbc rbe rbf rbh rbk rbo rbr rbs rbt rbu rcb rcc rce rcf rch rco rcr rcs rct rcu re- reb rec ree ref reh rek reo rer res ret reu rfb rfc rfe rff rfh rfk rfo rfr rfs rft rfu rh- rhb rhc rhe rhf rhh rho rhr rhs rht rhu rkb rkc rke rkf rkk rko rks rkt rku rob roc roe rof roh rok roo ror ros rot rou rrb rrc rrf rrh rrk rrr rrs rrt rru rsb rsc rse rsf rsh rsk rso rsr rss rst rsu rtb rtc rte rtf rtk rto rtr rts rtt rtu rub ruc rue ruf ruh ruk ruo rur rus rut ruu sbb sbc sbe sbf sbh sbk sbo sbr sbs sbt sbu scb scc sce scf sch sck sco scr scs sct scu se- seb sec see sef seh sek seo ser ses set seu sfb sfc sfe sff sfh sfk sfo sfr sfs sft sfu sh- shb shc she shf shh shk sho shr shs sht shu sk- skb skc ske skf skh skk sko skr sks skt sku sob soc soe sof soh sok soo sor sos sot sou sr- srb