-er -ol b-u bbb bbe bbi bbl bbo bbr bbu be- beb bee bei bel beo ber beu bev bi- bib bie bii bil bio bir biu biv blb ble bli bll blo blr blu blv bob boe boi bol boo bor bou bov brb bre bri brl bro brr bru brv bub bue bui bul buo bur buu bvb bve bvi bvl bvo bvr bvu bvv ebb ebe ebi ebl ebo ebr ebu ebv eeb eee eel eeo eer eev eib eie eii eil eio eir eiu eiv elb ele eli ell elo elr elu elv eo- eob eoe eoi eol eoo eor eou erb ere eri erl ero err eru erv eu- eub eue eui eul eur euv evb eve evi evl evo evr evv i-v ibb ibe ibi ibl ibo ibr ibu ibv ie- iee iei iel ier iev iib iie iii iil iio iir iiu il- ilb ile ili ill ilo ilr ilu ilv io- iob ioe ioi iol ioo ior iou iov ir- irb ire iri irl iro irr iru irv iu- iub iue iui iur ivb ive ivi ivl ivo ivr ivu ivv lbb lbe lbi lbl lbo lbr lbu lbv leb lee lei lel leo ler leu lev lib lie lii lil lio lir liu liv llb lle lli lll llo llr llu llv lob loe loi lol loo lor lou lov lrb lri lro lrr lru lrv lub lue lui lul luo lur luu luv lvb lve lvi lvl lvr lvv o-i ob- obb obe obi obl obo obr obu obv oeb oee oei oel oeo oer oib oie oii oil oio oir oiu oiv olb ole oli oll olo olu oo- oob ooi ool ooo oor oov or- orb ore ori orl oro orr oru orv ou- oue oui oul ouo our ov- ovb ove ovi ovl ovo ovv rbb rbe rbi rbl rbo rbr rbu re- reb ree rei rel reo rer reu rev rib rie rii ril rio rir riv rle rli rll rlo rlr rlu rob roe roi rol roo ror rou rov rrb rri rrl rrr rru rub rue rui ruo rur ruu ruv rvb rve rvi rvl rvo rvr rvu rvv ubb ube ubi ubl ubo ubr ubu ubv ueb uee uei uel uer uib uie uii uil uio uir uiu ulb ule uli ull ulo ulr ulu ulv uob uoe uol uoo uor ur- urb ure uri url uro urr uru uue uur uuu uvb uve uvl uvo uvu uvv v-e vbi vbl vbo vbr vbv veb vee vei vel veo ver veu vi- vib vie vii vil vio vir viu viv vl- vlb vle vll vlo vlv vob voe voi vol voo vor vou vov vrb vre vri vrr vru vue vul vur vuv vvb vvi vvo vvr vvv