-er b-u bbb bbe bbg bbi bbk bbn bbo bbr bbu be- beb bee beg bei bek ben beo ber beu bgb bge bgg bgi bgk bgn bgo bgr bgu bi- bib bie big bii bik bin bio bir biu bkb bke bkg bkk bkn bko bkr bnb bne bng bni bnk bnn bno bnr bnu bob boe bog boi bok bon boo bor bou brb bre brg bri brk brn bro brr bru bub bue bug bui buk bun buo bur buu ebb ebe ebg ebi ebk ebn ebo ebr ebu eeb eee eeg eek een eeo eer egb ege egg egi egn ego egr egu eib eie eig eii eik ein eio eir eiu ekb eke ekg eki eko ekr eku en- enb ene eng eni enk enn eno enr enu eo- eob eoe eog eoi eok eon eoo eor eou erb ere erg eri erk ern ero err eru eu- eub eue eug eui eun eur gbe gbg gbi gbk gbn gbo gbr gbu ge- geb gee geg gei gek gen geo ger geu ggb ggg ggi ggn ggo ggr ggu gib gie gig gii gik gin gio gir giu gkb gkn gko gnb gne gni gnn gno gnr gnu gob goe gog goi gok gon goo gor gou grb gre grg gri grk grn gro grr gru gu- gub gue gug gui guk gun guo gur guu ibb ibe ibg ibi ibk ibn ibo ibr ibu ie- iee ieg iei iek ien ier igb ige igg igi igk ign igo igr igu iib iie iii iin iio iir iiu ikb ike iki ikk iko ikr iku in- inb ine ing ini ink inn ino inr inu io- iob ioe iog ioi ion ioo ior iou ir- irb ire irg iri irk irn iro irr iru iu- iub iue iug iui iur kbb kbe kbi kbk kbn kbo kbr kbu ke- keb kee keg kei kek ken keo ker kgb kgi kgo kgu kib kie kig kii kik kin kio kir kiu kkb kke kki kkk kkn kkr kku kn- kne kng kni knk knn kno knr knu kob koe kog koi kok kon koo kor kou krg kri krk krn kro krr kru kub kue kug kui kuk kun kur kuu n-i nbb nbe nbg nbi nbk nbn nbo nbr nbu ne- neb nee neg nei nek nen neo ner neu ngb nge ngg ngi ngk ngn ngo ngu nib nie nig nii nik nin nio nir niu nke nki nkk nkn nko nkr nku nnb nne nng nni nnk nnn nno nnu no- nob noe nog noi nok non noo nor nou nrb nre nrg nri nrk nrn nro nrr nru nub nue nug nui nuk nun nuo nur nuu o-i ob- obb obe obg obi obk obn obo obr obu oeb oee oeg oei oen oeo oer oge ogg ogi ogn ogo oib oie oii oik oin oio oir oiu okb oke okg oki okk oko okr oku on- onb one ong oni onk onn ono onr onu oo- oob oog ooi ook oon ooo oor or- orb ore org ori ork orn oro orr oru ou- oue oui ouk oun ouo our rbb rbe rbg rbi rbk rbn rbo rbr rbu re- reb ree reg rei rek ren reo rer reu rgb rge rgg rgi rgk rgn rgo rgr rib rie rig rii rik rin rio rir rkb rke rkg rkk rko rku rnb rng rni rnn rno rnr rnu rob roe rog roi rok ron roo ror rou rrb rrg rri rrk rrn rrr rru rub rue rug rui ruk run ruo rur ruu ubb ube ubg ubi ubk ubn ubo ubr ubu ueb uee ueg uei uen uer ugb uge ugg ugi ugk ugn ugo ugr ugu uib uie uig uii uin uio uir uiu ukb uke uki ukk ukn ukr uku un- unb une ung uni unk unn uno unr unu uob uoe uog uok uon uoo uor ur- urb ure urg uri urk urn uro urr uru uue uug uun uur uuu