-er -ic b-u bbb bbc bbd bbe bbi bbk bbn bbr bbs bbu bcb bcc bcd bce bci bck bcn bcr bcs bcu bdb bdc bdd bde bdi bdk bdr bds bdu be- beb bec bed bee bei bek ben ber bes beu bi- bib bic bid bie bii bik bin bir bis biu bkb bkc bke bkk bkn bkr bks bnb bnc bnd bne bni bnk bnn bnr bns bnu brb brd bre bri brk brn brr brs bru bsb bsc bsd bse bsi bsk bsn bsr bss bsu bub buc bud bue bui buk bun bur bus buu c-- cbb cbc cbd cbe cbi cbk cbn cbr cbs cbu ccb ccc ccd cce cci cck ccn ccr ccs ccu cdb cdc cdd cde cdi cdk cdn cdr cds cdu ce- ceb cec ced cee cei cek cen cer ces ceu ci- cib cic cid cie cii cik cin cir cis ciu ckb ckc ckd cki cks cn- cnb cnc cnd cne cni cnn cnr cns cnu crb crc crd cre cri crk crn crr crs cru csb csc csd cse csi csk csn csr css csu cub cuc cud cue cui cuk cun cur cus cuu dbb dbc dbd dbe dbi dbk dbn dbr dbs dbu dcb dcc dcd dce dci dck dcn dcr dcs dcu ddb ddc ddd dde ddi ddk ddn ddr dds ddu de- deb dec ded dee dei dek den der des deu di- dib dic did die dii dik din dir dis diu dkb dkc dke dki dkk dkr dks dku dnb dnc dnd dne dni dnk dnn dnr dns drb drc drd dre dri drk drn drr drs dru dsb dsc dsd dse dsi dsk dsn dsr dss dsu dub duc dud due dui duk dun dur dus ebb ebc ebd ebe ebi ebk ebn ebr ebs ebu ec- ecb ecc ecd ece eci eck ecn ecr ecs ecu ed- edb edc edd ede edi edk edn edr eds edu eeb eec eed eee eek een eer ees eib eic eid eie eii eik ein eir eis eiu ekb ekc ekd eke eki ekr eks eku en- enb enc end ene eni enk enn enr ens enu erb erc erd ere eri erk ern err ers eru es- esb esc esd ese esi esk esn esr ess esu eu- eub euc eud eue eui eun eur eus i-d ibb ibc ibd ibe ibi ibk ibn ibr ibs ibu icb icc icd ice ici ick icn icr ics icu idb idc idd ide idi idk idn idr ids idu ie- iec ied iee iei iek ien ier ies iib iic iid iie iii iin iir iis iiu ikb ikc ike iki ikk ikr iks iku in- inb inc ind ine ini ink inn inr ins inu ir- irb irc ird ire iri irk irn irr irs iru is- isb isc isd ise isi isk isn isr iss isu iu- iub iuc iud iue iui iur ius kbb kbc kbd kbe kbi kbk kbn kbr kbs kbu kcb kcc kcd kce kci kck kcn kcr kcs kcu kdb kdc kde kdk kdr kds kdu ke- keb kec ked kee kei kek ken ker kes kib kic kid kie kii kik kin kir kis kiu kkb kkc kke kki kkk kkn kkr kks kku kn- knc knd kne kni knk knn knr knu krc krd kri krk krn krr krs kru ksb ksc ksd kse ksi ksk ksn ksr kss ksu kub kuc kud kue kui kuk kun kur kus kuu n-i nbb nbc nbd nbe nbi nbk nbn nbr nbs nbu ncb ncc ncd nce nci nck ncn ncr ncs ncu ndb ndc ndd nde ndi ndk ndn ndr nds ndu ne- neb nec ned nee nei nek nen ner nes neu nib nic nid nie nii nik nin nir nis niu nkc nke nki nkk nkn nkr nks nku nnb nnc nne nni nnk nnn nns nnu nrb nrc nrd nre nri nrk nrn nrr nrs nru nsb nsc nsd nse nsi nsk nsn nsr nss nsu nub nuc nud nue nui nuk nun nur nus nuu rbb rbc rbd rbe rbi rbk rbn rbr rbs rbu rcb rcc rcd rce rci rcn rcr rcs rcu rdb rdc rdd rde rdi rdn rdr rds rdu re- reb rec red ree rei rek ren rer res reu rib ric rid rie rii rik rin rir ris rkb rkc rke rkk rks rku rnb rnc rnd rni rnn rnr rns rnu rrb rrc rrd rri rrk rrn rrr rrs rru rsb rsc rsd rse rsi rsk rsn rsr rss rsu rub ruc rud rue rui ruk run rur rus ruu sbb sbc sbd sbe sbi sbk sbn sbr sbs sbu scb scc scd sce sci sck scn scr scs scu sdb sdc sdd sde sdi sdk sdn sdr sds sdu se- seb sec sed see sei sek sen ser ses seu sib sic sid sie sii sik sin sir sis siu sk- skb skc skd ske ski skk skr sks sku snb snc snd sne sni snk snn snr sns snu sr- srb src srd sre sri srk srn srr srs ss- ssb ssc ssd sse ssi ssk ssn ssr sss ssu sub suc sud sue sui suk sun sur sus suu ubb ubc ube ubi ubk ubn ubr ubs ubu ucb ucc ucd uce uci uck ucn ucr ucs ucu udb udc udd ude udi udk udn udr uds udu ueb uec ued uee uei uen uer ues uib uic uid uie uii uin uir uis uiu ukb ukc uke uki ukk ukn ukr uku un- unb unc und une uni unk unn unr uns unu ur- urb urc urd ure uri urk urn urr urs uru usb usc usd use usi usk usn usr uss usu uuc uue uun uur uus uuu