-er -ol bbb bbe bbg bbk bbl bbo bbr be- beb bee beg bek bel beo ber bez bgb bge bgg bgk bgl bgo bgr bgz bkb bke bkg bkk bkl bko bkr blb ble blg blk bll blo blr blz bob boe bog bok bol boo bor boz brb bre brg brk brl bro brr brz bze bzo bzr bzz 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 elz eo- eob eoe eog eok eol eoo eor erb ere erg erk erl ero err erz eze ezo ezr ezz gbe gbg gbk gbl gbo gbr gbz ge- geb gee geg gek gel geo ger gez ggb ggg ggo ggr ggz gkb gko glb gle glg glk gll glo glr glz gob goe gog gok gol goo gor goz grb gre grg grk grl gro grr gzo gzr k-z kbb kbe kbk kbl kbo kbr kbz ke- keb kee keg kek kel keo ker kez kgb kgl kgo kkb kke kkk kkl kkr kl- klb klg klo klr klz kob koe kog kok kol koo kor koz krg krk krl kro krr kzo lbb lbe lbg lbk lbl lbo lbr leb lee leg lek lel leo ler lez lgb lge lgg lgk lgl lgo lgr lkb lkg lkl lkr llb lle llg llk lll llo llr llz lob loe log lok lol loo lor loz lrb lrg lrk lro lrr lrz lzo lzr 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 orz oze ozo ozz rbb rbe rbg rbk rbl rbo rbr re- reb ree reg rek rel reo rer rez rgb rge rgg rgk rgo rgr rkb rke rkg rkk rko rkz rle rlg rll rlo rlr rob roe rog rok rol roo ror roz rrb rrg rrk rrl rrr rzb rze rzo z-g zbb zbl zbr zeb zee zek zel zeo zer zez zgb zgg zlr zo- zob zoe zog zok zol zoo zor zrl zro zzr zzz