-er b-u bbb bbd bbe bbi bbk bbn bbr bbs bbu bdb bdd bde bdi bdk bdr bds bdu be- beb bed bee bei bek ben ber bes beu bi- bib bid bie bii bik bin bir bis biu bkb bke bkk bkn bkr bks bnb bnd bne bni bnk bnn bnr bns bnu brb brd bre bri brk brn brr brs bru bsb bsd bse bsi bsk bsn bsr bss bsu bub bud bue bui buk bun bur bus buu dbb dbd dbe dbi dbk dbn dbr dbs dbu ddb ddd dde ddi ddk ddn ddr dds ddu de- deb ded dee dei dek den der des deu di- dib did die dii dik din dir dis diu dkb dke dki dkk dkr dks dku dnb dnd dne dni dnk dnn dnr dns drb drd dre dri drk drn drr drs dru dsb dsd dse dsi dsk dsn dsr dss dsu dub dud due dui duk dun dur dus ebb ebd ebe ebi ebk ebn ebr ebs ebu ed- edb edd ede edi edk edn edr eds edu eeb eed eee eek een eer ees eib eid eie eii eik ein eir eis eiu ekb ekd eke eki ekr eks eku en- enb end ene eni enk enn enr ens enu erb erd ere eri erk ern err ers eru es- esb esd ese esi esk esn esr ess esu eu- eub eud eue eui eun eur eus i-d ibb ibd ibe ibi ibk ibn ibr ibs ibu idb idd ide idi idk idn idr ids idu ie- ied iee iei iek ien ier ies iib iid iie iii iin iir iis iiu ikb ike iki ikk ikr iks iku in- inb ind ine ini ink inn inr ins inu ir- irb ird ire iri irk irn irr irs iru is- isb isd ise isi isk isn isr iss isu iu- iub iud iue iui iur ius kbb kbd kbe kbi kbk kbn kbr kbs kbu kdb kde kdk kdr kds kdu ke- keb ked kee kei kek ken ker kes kib kid kie kii kik kin kir kis kiu kkb kke kki kkk kkn kkr kks kku kn- knd kne kni knk knn knr knu krd kri krk krn krr krs kru ksb ksd kse ksi ksk ksn ksr kss ksu kub kud kue kui kuk kun kur kus kuu n-i nbb nbd nbe nbi nbk nbn nbr nbs nbu ndb ndd nde ndi ndk ndn ndr nds ndu ne- neb ned nee nei nek nen ner nes neu nib nid nie nii nik nin nir nis niu nke nki nkk nkn nkr nks nku nnb nne nni nnk nnn nns nnu nrb nrd nre nri nrk nrn nrr nrs nru nsb nsd nse nsi nsk nsn nsr nss nsu nub nud nue nui nuk nun nur nus nuu rbb rbd rbe rbi rbk rbn rbr rbs rbu rdb rdd rde rdi rdn rdr rds rdu re- reb red ree rei rek ren rer res reu rib rid rie rii rik rin rir ris rkb rke rkk rks rku rnb rnd rni rnn rnr rns rnu rrb rrd rri rrk rrn rrr rrs rru rsb rsd rse rsi rsk rsn rsr rss rsu rub rud rue rui ruk run rur rus ruu sbb sbd sbe sbi sbk sbn sbr sbs sbu sdb sdd sde sdi sdk sdn sdr sds sdu se- seb sed see sei sek sen ser ses seu sib sid sie sii sik sin sir sis siu sk- skb skd ske ski skk skr sks sku snb snd sne sni snk snn snr sns snu sr- srb srd sre sri srk srn srr srs ss- ssb ssd sse ssi ssk ssn ssr sss ssu sub sud sue sui suk sun sur sus suu ubb ube ubi ubk ubn ubr ubs ubu udb udd ude udi udk udn udr uds udu ueb ued uee uei uen uer ues uib uid uie uii uin uir uis uiu ukb uke uki ukk ukn ukr uku un- unb und une uni unk unn unr uns unu ur- urb urd ure uri urk urn urr urs uru usb usd use usi usk usn usr uss usu uue uun uur uus uuu