-er -ol b-u bbb bbe bbi bbk bbl bbo bbr bbt bbu be- beb bee bei bek bel beo ber bet beu bi- bib bie bii bik bil bio bir bit biu bkb bke bkk bkl bko bkr bkt blb ble bli blk bll blo blr blt blu bob boe boi bok bol boo bor bot bou brb bre bri brk brl bro brr brt bru btb bte bti btk btl bto btr btt btu bub bue bui buk bul buo bur but buu ebb ebe ebi ebk ebl ebo ebr ebt ebu eeb eee eek eel eeo eer eet eib eie eii eik eil eio eir eit eiu ekb eke eki ekl eko ekr ekt eku elb ele eli elk ell elo elr elt elu eo- eob eoe eoi eok eol eoo eor eot eou erb ere eri erk erl ero err ert eru etb ete eti etk etl eto etr ett etu eu- eub eue eui eul eur eut ibb ibe ibi ibk ibl ibo ibr ibt ibu ie- iee iei iek iel ier iet iib iie iii iil iio iir iit iiu ikb ike iki ikk ikl iko ikr ikt iku il- ilb ile ili ilk ill ilo ilr ilt ilu io- iob ioe ioi iol ioo ior iot iou ir- irb ire iri irk irl iro irr irt iru itb ite iti itk itl ito itt itu iu- iub iue iui iur iut k-t kbb kbe kbi kbk kbl kbo kbr kbu ke- keb kee kei kek kel keo ker ket kib kie kii kik kil kio kir kit kiu kkb kke kki kkk kkl kkr kkt kku kl- klb kli klo klr klt klu kob koe koi kok kol koo kor kot kou kri krk krl kro krr krt kru ktb kte ktk ktl kto ktr ktt ktu kub kue kui kuk kul kur kut kuu lbb lbe lbi lbk lbl lbo lbr lbt lbu leb lee lei lek lel leo ler let leu lib lie lii lik lil lio lir lit liu lkb lkl lkr lkt llb lle lli llk lll llo llr llt llu lob loe loi lok lol loo lor lot lou lrb lri lrk lro lrr lrt lru ltb lte lti ltk ltl lto ltr ltt ltu lub lue lui luk lul luo lur lut luu o-i ob- obb obe obi obk obl obo obr obt obu oeb oee oei oel oeo oer oet oib oie oii oik oil oio oir oit oiu okb oke oki okk okl oko okr oku olb ole oli olk oll olo olt olu oo- oob ooi ook ool ooo oor oot or- orb ore ori ork orl oro orr ort oru ot- otb ote oti otk otl oto otr ott otu ou- oue oui ouk oul ouo our out rbb rbe rbi rbk rbl rbo rbr rbt rbu re- reb ree rei rek rel reo rer ret reu rib rie rii rik ril rio rir rit rkb rke rkk rko rkt rku rle rli rll rlo rlr rlt rlu rob roe roi rok rol roo ror rot rou rrb rri rrk rrl rrr rrt rru rtb rte rti rtk rtl rto rtr rtt rtu rub rue rui ruk ruo rur rut ruu tbb tbe tbi tbk tbl tbo tbr tbt tbu te- teb tee tei tek tel teo ter tet teu tib tie tii tik til tio tir tit tiu tkb tke tkk tkl tko tkr tkt tle tli tlk tll tlo tlr tlt tlu to- tob toe toi tok tol too tor tot tou trb tre tri trk trl tro trr trt tru ttb tte tti ttk ttl tto ttr ttt ttu tub tue tui tuk tul tuo tur tut tuu ubb ube ubi ubk ubl ubo ubr ubt ubu ueb uee uei uel uer uet uib uie uii uil uio uir uit uiu ukb uke uki ukk ukl ukr uku ulb ule uli ulk ull ulo ulr ult ulu uob uoe uok uol uoo uor uot ur- urb ure uri urk url uro urr urt uru utb ute uti utk utl uto utr utt utu uue uur uut uuu