-er -ic -th b-u bbb bbc bbe bbh bbi bbk bbo bbr bbs bbt bbu bcb bcc bce bch bci bck bco bcr bcs bct bcu be- beb bec bee beh bei bek beo ber bes bet beu bhb bhc bhe bhh bhi bhk bho bhr bhs bht bhu bi- bib bic bie bih bii bik bio bir bis bit biu bkb bkc bke bkk bko bkr bks bkt bob boc boe boh boi bok boo bor bos bot bou brb bre brh bri brk bro brr brs brt bru bsb bsc bse bsh bsi bsk bso bsr bss bst bsu btb btc bte bth bti btk bto btr bts btt btu bub buc bue buh bui buk buo bur bus but buu c-- cbb cbc cbe cbh cbi cbk cbo cbr cbs cbt cbu ccb ccc cce cch cci cck cco ccr ccs cct ccu ce- ceb cec cee ceh cei cek ceo cer ces cet ceu ch- chb chc che chh chi chk cho chr chs cht chu ci- cib cic cie cih cii cik cio cir cis cit ciu ckb ckc ckh cki cko cks ckt co- cob coc coe coh coi cok coo cor cos cot cou crb crc cre crh cri crk cro crr crs crt cru csb csc cse csh csi csk cso csr css cst csu ctb ctc cte cth cti ctk cto ctr cts ctt ctu cub cuc cue cuh cui cuk cuo cur cus cut cuu ebb ebc ebe ebh ebi ebk ebo ebr ebs ebt ebu ec- ecb ecc ece ech eci eck eco ecr ecs ect ecu eeb eec eee eek eeo eer ees eet ehb ehc ehe ehh ehi eho ehr ehs eht ehu eib eic eie eii eik eio eir eis eit eiu ekb ekc eke ekh eki eko ekr eks ekt eku eo- eob eoc eoe eoh eoi eok eoo eor eos eot eou erb erc ere erh eri erk ero err ers ert eru es- esb esc ese esh esi esk eso esr ess est esu etb etc ete eth eti etk eto etr ets ett etu eu- eub euc eue eui eur eus eut h-i hbb hbc hbe hbh hbi hbk hbo hbr hbs hbt hbu hcb hcc hce hch hci hck hco hcr hcs hct he- heb hec hee heh hei hek heo her hes het heu hhb hhc hhe hhh hhi hhk hho hhr hhs hht hhu hib hic hie hih hii hik hio hir his hit hiu hkb hkh hki hkk hko hkr hks hkt hku hob hoc hoe hoh hoi hok hoo hor hos hot hou hr- hrb hrc hre hrh hri hrk hro hrr hrs hrt hru hsb hsc hse hsh hsi hsk hsr hss hst hsu htb htc hte hth hti htk hto htr hts htt hub huc hue huh hui huk huo hur hus hut huu ibb ibc ibe ibh ibi ibk ibo ibr ibs ibt ibu icb icc ice ich ici ick ico icr ics ict icu ie- iec iee iei iek ier ies iet ihb ihc ihe ihh ihi ihk iho ihr ihs iht ihu iib iic iie iih iii iio iir iis iit iiu ikb ikc ike iki ikk iko ikr iks ikt iku io- iob ioc ioe ioh ioi ioo ior ios iot iou ir- irb irc ire iri irk iro irr irs irt iru is- isb isc ise ish isi isk iso isr iss ist isu itb itc ite ith iti itk ito its itt itu iu- iub iuc iue iui iur ius iut k-t kbb kbc kbe kbh kbi kbk kbo kbr kbs kbu kcb kcc kce kch kci kck kcr kcs kct kcu ke- keb kec kee keh kei kek keo ker kes ket khe khh khi khk kho khr khs khu kib kic kie kih kii kik kio kir kis kit kiu kkb kkc kke kkh kki kkk kkr kks kkt kku kob koc koe koh koi kok koo kor kos kot kou krc kri krk kro krr krs krt kru ksb ksc kse ksh ksi ksk kso ksr kss kst ksu ktb ktc kte kth ktk kto ktr kts ktt ktu kub kuc kue kuh kui kuk kur kus kut kuu o-i ob- obb obc obe obh obi obk obo obr obs obt obu oc- ocb occ och oci ock oco ocr ocs oct ocu oeb oec oee oeh oei oeo oer oes oet ohc ohe ohh ohi oho ohr ohs oht ohu oib oic oie oii oik oio oir ois oit oiu okb okc oke oki okk oko okr oks oku oo- oob ooc ooh ooi ook ooo oor oos oot or- orb orc ore orh ori ork oro orr ors ort oru os- osb osc ose osh osi osk oso osr oss ost osu ot- otb otc ote oth oti otk oto otr ots ott otu ou- ouc oue ouh oui ouk ouo our ous out rbb rbc rbe rbh rbi rbk rbo rbr rbs rbt rbu rcb rcc rce rch rci rco rcr rcs rct rcu re- reb rec ree reh rei rek reo rer res ret reu rh- rhb rhc rhe rhh rhi rho rhr rhs rht rhu rib ric rie rih rii rik rio rir ris rit rkb rkc rke rkk rko rks rkt rku rob roc roe roh roi rok roo ror ros rot rou rrb rrc rrh rri rrk rrr rrs rrt rru rsb rsc rse rsh rsi rsk rso rsr rss rst rsu rtb rtc rte rti rtk rto rtr rts rtt rtu rub ruc rue ruh rui ruk ruo rur rus rut ruu sbb sbc sbe sbh sbi sbk sbo sbr sbs sbt sbu scb scc sce sch sci sck sco scr scs sct scu se- seb sec see seh sei sek seo ser ses set seu sh- shb shc she shh shi shk sho shr shs sht shu sib sic sie sih sii sik sio sir sis sit siu sk- skb skc ske skh ski skk sko skr