-er -ol bbb bbe bbi bbl bbo bbr bbt be- beb bee bei bel beo ber bet bi- bib bie bii bil bio bir bit blb ble bli bll blo blr blt bob boe boi bol boo bor bot brb bre bri brl bro brr brt btb bte bti btl bto btr btt ebb ebe ebi ebl ebo ebr ebt eeb eee eel eeo eer eet eib eie eii eil eio eir eit elb ele eli ell elo elr elt eo- eob eoe eoi eol eoo eor eot erb ere eri erl ero err ert etb ete eti etl eto etr ett ibb ibe ibi ibl ibo ibr ibt ie- iee iei iel ier iet iib iie iii iil iio iir iit il- ilb ile ili ill ilo ilr ilt io- iob ioe ioi iol ioo ior iot ir- irb ire iri irl iro irr irt itb ite iti itl ito itt lbb lbe lbi lbl lbo lbr lbt leb lee lei lel leo ler let lib lie lii lil lio lir lit llb lle lli lll llo llr llt lob loe loi lol loo lor lot lrb lri lro lrr lrt ltb lte lti ltl lto ltr ltt o-i ob- obb obe obi obl obo obr obt oeb oee oei oel oeo oer oet oib oie oii oil oio oir oit olb ole oli oll olo olt oo- oob ooi ool ooo oor oot or- orb ore ori orl oro orr ort ot- otb ote oti otl oto otr ott rbb rbe rbi rbl rbo rbr rbt re- reb ree rei rel reo rer ret rib rie rii ril rio rir rit rle rli rll rlo rlr rlt rob roe roi rol roo ror rot rrb rri rrl rrr rrt rtb rte rti rtl rto rtr rtt tbb tbe tbi tbl tbo tbr tbt te- teb tee tei tel teo ter tet tib tie tii til tio tir tit tle tli tll tlo tlr tlt to- tob toe toi tol too tor tot trb tre tri trl tro trr trt ttb tte tti ttl tto ttr ttt