-er -ol bbb bbe bbg bbl bbo bbr be- beb bee beg bel beo ber bgb bge bgg bgl bgo bgr blb ble blg bll blo blr bob boe bog bol boo bor brb bre brg brl bro brr ebb ebe ebg ebl ebo ebr eeb eee eeg eel eeo eer egb ege egg egl ego egr elb ele elg ell elo elr eo- eob eoe eog eol eoo eor erb ere erg erl ero err gbe gbg gbl gbo gbr ge- geb gee geg gel geo ger ggb ggg ggo ggr glb gle glg gll glo glr gob goe gog gol goo gor grb gre grg grl gro grr lbb lbe lbg lbl lbo lbr leb lee leg lel leo ler lgb lge lgg lgl lgo lgr llb lle llg lll llo llr lob loe log lol loo lor lrb lrg lro lrr ob- obb obe obg obl obo obr oeb oee oeg oel oeo oer oge ogg ogl ogo olb ole olg oll olo oo- oob oog ool ooo oor or- orb ore org orl oro orr rbb rbe rbg rbl rbo rbr re- reb ree reg rel reo rer rgb rge rgg rgo rgr rle rlg rll rlo rlr rob roe rog rol roo ror rrb rrg rrl rrr