-er b-u bbb bbd bbe bbi bbk bbn bbr bbu bdb bdd bde bdi bdk bdr bdu be- beb bed bee bei bek ben ber beu bi- bib bid bie bii bik bin bir biu bkb bke bkk bkn bkr bnb bnd bne bni bnk bnn bnr bnu brb brd bre bri brk brn brr bru bub bud bue bui buk bun bur buu dbb dbd dbe dbi dbk dbn dbr dbu ddb ddd dde ddi ddk ddn ddr ddu de- deb ded dee dei dek den der deu di- dib did die dii dik din dir diu dkb dke dki dkk dkr dku dnb dnd dne dni dnk dnn dnr drb drd dre dri drk drn drr dru dub dud due dui duk dun dur ebb ebd ebe ebi ebk ebn ebr ebu ed- edb edd ede edi edk edn edr edu eeb eed eee eek een eer eib eid eie eii eik ein eir eiu ekb ekd eke eki ekr eku en- enb end ene eni enk enn enr enu erb erd ere eri erk ern err eru eu- eub eud eue eui eun eur i-d ibb ibd ibe ibi ibk ibn ibr ibu idb idd ide idi idk idn idr idu ie- ied iee iei iek ien ier iib iid iie iii iin iir iiu ikb ike iki ikk ikr iku in- inb ind ine ini ink inn inr inu ir- irb ird ire iri irk irn irr iru iu- iub iud iue iui iur kbb kbd kbe kbi kbk kbn kbr kbu kdb kde kdk kdr kdu ke- keb ked kee kei kek ken ker kib kid kie kii kik kin kir kiu kkb kke kki kkk kkn kkr kku kn- knd kne kni knk knn knr knu krd kri krk krn krr kru kub kud kue kui kuk kun kur kuu n-i nbb nbd nbe nbi nbk nbn nbr nbu ndb ndd nde ndi ndk ndn ndr ndu ne- neb ned nee nei nek nen ner neu nib nid nie nii nik nin nir niu nke nki nkk nkn nkr nku nnb nne nni nnk nnn nnu nrb nrd nre nri nrk nrn nrr nru nub nud nue nui nuk nun nur nuu rbb rbd rbe rbi rbk rbn rbr rbu rdb rdd rde rdi rdn rdr rdu re- reb red ree rei rek ren rer reu rib rid rie rii rik rin rir rkb rke rkk rku rnb rnd rni rnn rnr rnu rrb rrd rri rrk rrn rrr rru rub rud rue rui ruk run rur ruu ubb ube ubi ubk ubn ubr ubu udb udd ude udi udk udn udr udu ueb ued uee uei uen uer uib uid uie uii uin uir uiu ukb uke uki ukk ukn ukr uku un- unb und une uni unk unn unr unu ur- urb urd ure uri urk urn urr uru uue uun uur uuu