-er bbb bbe bbg bbi bbk bbn bbr be- beb bee beg bei bek ben ber bgb bge bgg bgi bgk bgn bgr bi- bib bie big bii bik bin bir bkb bke bkg bkk bkn bkr bnb bne bng bni bnk bnn bnr brb bre brg bri brk brn brr ebb ebe ebg ebi ebk ebn ebr eeb eee eeg eek een eer egb ege egg egi egn egr eib eie eig eii eik ein eir ekb eke ekg eki ekr en- enb ene eng eni enk enn enr erb ere erg eri erk ern err gbe gbg gbi gbk gbn gbr ge- geb gee geg gei gek gen ger ggb ggg ggi ggn ggr gib gie gig gii gik gin gir gkb gkn gnb gne gni gnn gnr grb gre grg gri grk grn grr ibb ibe ibg ibi ibk ibn ibr ie- iee ieg iei iek ien ier igb ige igg igi igk ign igr iib iie iii iin iir ikb ike iki ikk ikr in- inb ine ing ini ink inn inr ir- irb ire irg iri irk irn irr kbb kbe kbi kbk kbn kbr ke- keb kee keg kei kek ken ker kgb kgi kib kie kig kii kik kin kir kkb kke kki kkk kkn kkr kn- kne kng kni knk knn knr krg kri krk krn krr n-i nbb nbe nbg nbi nbk nbn nbr ne- neb nee neg nei nek nen ner ngb nge ngg ngi ngk ngn nib nie nig nii nik nin nir nke nki nkk nkn nkr nnb nne nng nni nnk nnn nrb nre nrg nri nrk nrn nrr rbb rbe rbg rbi rbk rbn rbr re- reb ree reg rei rek ren rer rgb rge rgg rgi rgk rgn rgr rib rie rig rii rik rin rir rkb rke rkg rkk rnb rng rni rnn rnr rrb rrg rri rrk rrn rrr