-er -ol bbb bbe bbg bbk bbl bbo bbr be- beb bee beg bek bel beo ber bgb bge bgg bgk bgl bgo bgr bkb bke bkg bkk bkl bko bkr blb ble blg blk bll blo blr bob boe bog bok bol boo bor brb bre brg brk brl bro brr ebb ebe ebg ebk ebl ebo ebr eeb eee eeg eek eel eeo eer egb ege egg egl ego egr ekb eke ekg ekl eko ekr elb ele elg elk ell elo elr eo- eob eoe eog eok eol eoo eor erb ere erg erk erl ero err gbe gbg gbk gbl gbo gbr ge- geb gee geg gek gel geo ger ggb ggg ggo ggr gkb gko glb gle glg glk gll glo glr gob goe gog gok gol goo gor grb gre grg grk grl gro grr kbb kbe kbk kbl kbo kbr ke- keb kee keg kek kel keo ker kgb kgl kgo kkb kke kkk kkl kkr kl- klb klg klo klr kob koe kog kok kol koo kor krg krk krl kro krr lbb lbe lbg lbk lbl lbo lbr leb lee leg lek lel leo ler lgb lge lgg lgk lgl lgo lgr lkb lkg lkl lkr llb lle llg llk lll llo llr lob loe log lok lol loo lor lrb lrg lrk lro lrr ob- obb obe obg obk obl obo obr oeb oee oeg oel oeo oer oge ogg ogl ogo okb oke okg okk okl oko okr olb ole olg olk oll olo oo- oob oog ook ool ooo oor or- orb ore org ork orl oro orr rbb rbe rbg rbk rbl rbo rbr re- reb ree reg rek rel reo rer rgb rge rgg rgk rgo rgr rkb rke rkg rkk rko rle rlg rll rlo rlr rob roe rog rok rol roo ror rrb rrg rrk rrl rrr