-er -th b-u bbb bbc bbe bbh bbk bbn bbo bbr bbs bbt bbu bcb bcc bce bch bck bcn bco bcr bcs bct bcu be- beb bec bee beh bek ben beo ber bes bet beu bhb bhc bhe bhh bhk bho bhr bhs bht bhu bkb bkc bke bkk bkn bko bkr bks bkt bnb bnc bne bnk bnn bno bnr bns bnt bnu bob boc boe boh bok bon boo bor bos bot bou brb bre brh brk brn bro brr brs brt bru bsb bsc bse bsh bsk bsn bso bsr bss bst bsu btb btc bte bth btk btn bto btr bts btt btu bub buc bue buh buk bun buo bur bus but buu c-- cbb cbc cbe cbh cbk cbn cbo cbr cbs cbt cbu ccb ccc cce cch cck ccn cco ccr ccs cct ccu ce- ceb cec cee ceh cek cen ceo cer ces cet ceu ch- chb chc che chh chk chn cho chr chs cht chu ckb ckc ckh cko cks ckt cn- cnb cnc cne cnh cnn cno cnr cns cnt cnu co- cob coc coe coh cok con coo cor cos cot cou crb crc cre crh crk crn cro crr crs crt cru csb csc cse csh csk csn cso csr css cst csu ctb ctc cte cth ctk ctn cto ctr cts ctt ctu cub cuc cue cuh cuk cun cuo cur cus cut cuu ebb ebc ebe ebh ebk ebn ebo ebr ebs ebt ebu ec- ecb ecc ece ech eck ecn eco ecr ecs ect ecu eeb eec eee eek een eeo eer ees eet ehb ehc ehe ehh ehn eho ehr ehs eht ehu ekb ekc eke ekh eko ekr eks ekt eku en- enb enc ene enh enk enn eno enr ens ent enu eo- eob eoc eoe eoh eok eon eoo eor eos eot eou erb erc ere erh erk ern ero err ers ert eru es- esb esc ese esh esk esn eso esr ess est esu etb etc ete eth etk etn eto etr ets ett etu eu- eub euc eue eun eur eus eut hbb hbc hbe hbh hbk hbn hbo hbr hbs hbt hbu hcb hcc hce hch hck hcn hco hcr hcs hct he- heb hec hee heh hek hen heo her hes het heu hhb hhc hhe hhh hhk hhn hho hhr hhs hht hhu hkb hkh hkk hkn hko hkr hks hkt hku hnb hnc hne hnh hnk hnn hno hns hnt hnu hob hoc hoe hoh hok hon hoo hor hos hot hou hr- hrb hrc hre hrh hrk hrn hro hrr hrs hrt hru hsb hsc hse hsh hsk hsn hsr hss hst hsu htb htc hte hth htk htn hto htr hts htt hub huc hue huh huk hun huo hur hus hut huu k-t kbb kbc kbe kbh kbk kbn kbo kbr kbs kbu kcb kcc kce kch kck kcn kcr kcs kct kcu ke- keb kec kee keh kek ken keo ker kes ket khe khh khk khn kho khr khs khu kkb kkc kke kkh kkk kkn kkr kks kkt kku kn- knc kne knk knn kno knr knt knu kob koc koe koh kok kon koo kor kos kot kou krc krk krn kro krr krs krt kru ksb ksc kse ksh ksk ksn kso ksr kss kst ksu ktb ktc kte kth ktk ktn kto ktr kts ktt ktu kub kuc kue kuh kuk kun kur kus kut kuu nbb nbc nbe nbk nbn nbo nbr nbs nbt nbu ncb ncc nce nch nck ncn nco ncr ncs nct ncu ne- neb nec nee neh nek nen neo ner nes net neu nhb nhc nhe nhh nhk nhn nhr nhs nht nhu nkc nke nkk nkn nko nkr nks nkt nku nnb nnc nne nnh nnk nnn nno nns nnt nnu no- nob noc noe noh nok non noo nor nos not nou nrb nrc nre nrk nrn nro nrr nrs nrt nru nsb nsc nse nsh nsk nsn nso nsr nss nst nsu ntb ntc nte nth ntk ntn nto ntr nts ntt ntu nub nuc nue nuh nuk nun nuo nur nus nut nuu ob- obb obc obe obh obk obn obo obr obs obt obu oc- ocb occ och ock ocn oco ocr ocs oct ocu oeb oec oee oeh oen oeo oer oes oet ohc ohe ohh ohn oho ohr ohs oht ohu okb okc oke okk oko okr oks oku on- onb onc one onh onk onn ono onr ons ont onu oo- oob ooc ooh ook oon ooo oor oos oot or- orb orc ore orh ork orn oro orr ors ort oru os- osb osc ose osh osk osn oso osr oss ost osu ot- otb otc ote oth otk otn oto otr ots ott otu ou- ouc oue ouh ouk oun ouo our ous out rbb rbc rbe rbh rbk rbn rbo rbr rbs rbt rbu rcb rcc rce rch rcn rco rcr rcs rct rcu re- reb rec ree reh rek ren reo rer res ret reu rh- rhb rhc rhe rhh rhn rho rhr rhs rht rhu rkb rkc rke rkk rko rks rkt rku rnb rnc rnh rnn rno rnr rns rnt rnu rob roc roe roh rok ron roo ror ros rot rou rrb rrc rrh rrk rrn rrr rrs rrt rru rsb rsc rse rsh rsk rsn rso rsr rss rst rsu rtb rtc rte rtk rtn rto rtr rts rtt rtu rub ruc rue ruh ruk run ruo rur rus rut ruu sbb sbc sbe sbh sbk sbn sbo sbr sbs sbt sbu scb scc sce sch sck scn sco scr scs sct scu se- seb sec see seh sek sen seo ser ses set seu sh- shb shc she shh shk shn sho shr shs sht shu sk- skb skc ske skh skk sko skr sks skt sku snb snc sne snk snn sno snr sns snt snu sob soc