-er -ol b-p bbb bbe bbl bbo bbp bbr bbt be- beb bee bel beo bep ber bet blb ble bll blo blp blr blt bob boe bol boo bop bor bot bpb bpe bpl bpo bpp bpr bpt brb bre brl bro brp brr brt btb bte btl bto btp btr btt ebb ebe ebl ebo ebp ebr ebt eeb eee eel eeo eep eer eet elb ele ell elo elp elr elt eo- eob eoe eol eoo eop eor eot ep- epb epe epl epo epp epr ept erb ere erl ero erp err ert etb ete etl eto etp etr ett l-p lbb lbe lbl lbo lbp lbr lbt leb lee lel leo lep ler let llb lle lll llo llp llr llt lob loe lol loo lop lor lot lpb lpe lpl lpo lpp lpr lpt lrb lro lrp lrr lrt ltb lte ltl lto ltp ltr ltt ob- obb obe obl obo obp obr obt oeb oee oel oeo oep oer oet olb ole oll olo olp olt oo- oob ool ooo oop oor oot op- opb ope opl opo opp opr opt or- orb ore orl oro orp orr ort ot- otb ote otl oto otp otr ott p-p pbb pbe pbl pbo pbp pbr pbt peb pee pel peo pep per pet plb ple pll plo plp plr plt pob poe pol poo pop por pot ppb ppe ppl ppo ppp ppr ppt prb pre prl pro prp prr prt pt- ptb pte ptl pto ptp ptr ptt rbb rbe rbl rbo rbp rbr rbt re- reb ree rel reo rep rer ret rle rll rlo rlp rlr rlt rob roe rol roo rop ror rot rpb rpe rpl rpo rpp rpr rpt rrb rrl rrp rrr rrt rtb rte rtl rto rtp rtr rtt tbb tbe tbl tbo tbp tbr tbt te- teb tee tel teo tep ter tet tle tll tlo tlp tlr tlt to- tob toe tol too top tor tot tpb tpe tpl tpo tpp tpr tpt trb tre trl tro trp trr trt ttb tte ttl tto ttp ttr ttt