-er -ol bbb bbe bbg bbl bbo bbr bbt be- beb bee beg bel beo ber bet bgb bge bgg bgl bgo bgr bgt blb ble blg bll blo blr blt bob boe bog bol boo bor bot brb bre brg brl bro brr brt btb bte btg btl bto btr btt ebb ebe ebg ebl ebo ebr ebt eeb eee eeg eel eeo eer eet egb ege egg egl ego egr egt elb ele elg ell elo elr elt eo- eob eoe eog eol eoo eor eot erb ere erg erl ero err ert etb ete etg etl eto etr ett gbe gbg gbl gbo gbr gbt ge- geb gee geg gel geo ger get ggb ggg ggo ggr ggt glb gle glg gll glo glr glt gob goe gog gol goo gor got grb gre grg grl gro grr grt gtb gte gtg gtl gto gtr gtt lbb lbe lbg lbl lbo lbr lbt leb lee leg lel leo ler let lgb lge lgg lgl lgo lgr lgt llb lle llg lll llo llr llt lob loe log lol loo lor lot lrb lrg lro lrr lrt ltb lte ltg ltl lto ltr ltt ob- obb obe obg obl obo obr obt oeb oee oeg oel oeo oer oet oge ogg ogl ogo ogt olb ole olg oll olo olt oo- oob oog ool ooo oor oot or- orb ore org orl oro orr ort ot- otb ote otg otl oto otr ott rbb rbe rbg rbl rbo rbr rbt re- reb ree reg rel reo rer ret rgb rge rgg rgo rgr rgt rle rlg rll rlo rlr rlt rob roe rog rol roo ror rot rrb rrg rrl rrr rrt rtb rte rtg rtl rto rtr rtt tbb tbe tbg tbl tbo tbr tbt te- teb tee teg tel teo ter tet tgb tge tgg tgl tgo tgr tgt tle tlg tll tlo tlr tlt to- tob toe tog tol too tor tot trb tre trg trl tro trr trt ttb tte ttg ttl tto ttr ttt