-er bbb bbe bbg bbi bbk bbl bbr be- beb bee beg bei bek bel ber bgb bge bgg bgi bgk bgl bgr bi- bib bie big bii bik bil bir bkb bke bkg bkk bkl bkr blb ble blg bli blk bll blr brb bre brg bri brk brl brr ebb ebe ebg ebi ebk ebl ebr eeb eee eeg eek eel eer egb ege egg egi egl egr eib eie eig eii eik eil eir ekb eke ekg eki ekl ekr elb ele elg eli elk ell elr erb ere erg eri erk erl err gbe gbg gbi gbk gbl gbr ge- geb gee geg gei gek gel ger ggb ggg ggi ggr gib gie gig gii gik gil gir gkb glb gle glg gli glk gll glr grb gre grg gri grk grl grr ibb ibe ibg ibi ibk ibl ibr ie- iee ieg iei iek iel ier igb ige igg igi igk igl igr iib iie iii iil iir ikb ike iki ikk ikl ikr il- ilb ile ilg ili ilk ill ilr ir- irb ire irg iri irk irl irr kbb kbe kbi kbk kbl kbr ke- keb kee keg kei kek kel ker kgb kgi kgl kib kie kig kii kik kil kir kkb kke kki kkk kkl kkr kl- klb klg kli klr krg kri krk krl krr lbb lbe lbg lbi lbk lbl lbr leb lee leg lei lek lel ler lgb lge lgg lgi lgk lgl lgr lib lie lig lii lik lil lir lkb lkg lkl lkr llb lle llg lli llk lll llr lrb lrg lri lrk lrr rbb rbe rbg rbi rbk rbl rbr re- reb ree reg rei rek rel rer rgb rge rgg rgi rgk rgr rib rie rig rii rik ril rir rkb rke rkg rkk rle rlg rli rll rlr rrb rrg rri rrk rrl rrr