-er -ol b-u bbb bbe bbi bbl bbo bbr bbt bbu be- beb bee bei bel beo ber bet beu bi- bib bie bii bil bio bir bit biu blb ble bli bll blo blr blt blu bob boe boi bol boo bor bot bou brb bre bri brl bro brr brt bru btb bte bti btl bto btr btt btu bub bue bui bul buo bur but buu ebb ebe ebi ebl ebo ebr ebt ebu eeb eee eel eeo eer eet eib eie eii eil eio eir eit eiu elb ele eli ell elo elr elt elu eo- eob eoe eoi eol eoo eor eot eou erb ere eri erl ero err ert eru etb ete eti etl eto etr ett etu eu- eub eue eui eul eur eut ibb ibe ibi ibl ibo ibr ibt ibu ie- iee iei iel ier iet iib iie iii iil iio iir iit iiu il- ilb ile ili ill ilo ilr ilt ilu io- iob ioe ioi iol ioo ior iot iou ir- irb ire iri irl iro irr irt iru itb ite iti itl ito itt itu iu- iub iue iui iur iut lbb lbe lbi lbl lbo lbr lbt lbu leb lee lei lel leo ler let leu lib lie lii lil lio lir lit liu llb lle lli lll llo llr llt llu lob loe loi lol loo lor lot lou lrb lri lro lrr lrt lru ltb lte lti ltl lto ltr ltt ltu lub lue lui lul luo lur lut luu o-i ob- obb obe obi obl obo obr obt obu oeb oee oei oel oeo oer oet oib oie oii oil oio oir oit oiu olb ole oli oll olo olt olu oo- oob ooi ool ooo oor oot or- orb ore ori orl oro orr ort oru ot- otb ote oti otl oto otr ott otu ou- oue oui oul ouo our out rbb rbe rbi rbl rbo rbr rbt rbu re- reb ree rei rel reo rer ret reu rib rie rii ril rio rir rit rle rli rll rlo rlr rlt rlu rob roe roi rol roo ror rot rou rrb rri rrl rrr rrt rru rtb rte rti rtl rto rtr rtt rtu rub rue rui ruo rur rut ruu tbb tbe tbi tbl tbo tbr tbt tbu te- teb tee tei tel teo ter tet teu tib tie tii til tio tir tit tiu tle tli tll tlo tlr tlt tlu to- tob toe toi tol too tor tot tou trb tre tri trl tro trr trt tru ttb tte tti ttl tto ttr ttt ttu tub tue tui tul tuo tur tut tuu ubb ube ubi ubl ubo ubr ubt ubu ueb uee uei uel uer uet uib uie uii uil uio uir uit uiu ulb ule uli ull ulo ulr ult ulu uob uoe uol uoo uor uot ur- urb ure uri url uro urr urt uru utb ute uti utl uto utr utt utu uue uur uut uuu