-er -ol bbb bbe bbi bbk bbl bbo bbr bbs be- beb bee bei bek bel beo ber bes bez bi- bib bie bii bik bil bio bir bis biz bkb bke bkk bkl bko bkr bks blb ble bli blk bll blo blr bls blz bob boe boi bok bol boo bor bos boz brb bre bri brk brl bro brr brs brz bsb bse bsi bsk bsl bso bsr bss bze bzo bzr bzs bzz ebb ebe ebi ebk ebl ebo ebr ebs eeb eee eek eel eeo eer ees eib eie eii eik eil eio eir eis ekb eke eki ekl eko ekr eks elb ele eli elk ell elo elr els elz eo- eob eoe eoi eok eol eoo eor eos erb ere eri erk erl ero err ers erz es- esb ese esi esk esl eso esr ess eze ezo ezr ezs ezz ibb ibe ibi ibk ibl ibo ibr ibs ibz ie- iee iei iek iel ier ies iib iie iii iil iio iir iis ikb ike iki ikk ikl iko ikr iks il- ilb ile ili ilk ill ilo ilr ils ilz io- iob ioe ioi iol ioo ior ios ir- irb ire iri irk irl iro irr irs is- isb ise isi isk isl iso isr iss ize izi izo izz k-z kbb kbe kbi kbk kbl kbo kbr kbs kbz ke- keb kee kei kek kel keo ker kes kez kib kie kii kik kil kio kir kis kiz kkb kke kki kkk kkl kkr kks kl- klb kli klo klr kls klz kob koe koi kok kol koo kor kos koz kri krk krl kro krr krs ksb kse ksi ksk ksl kso ksr kss kzo lbb lbe lbi lbk lbl lbo lbr lbs leb lee lei lek lel leo ler les lez lib lie lii lik lil lio lir lis liz lkb lkl lkr lks llb lle lli llk lll llo llr lls llz lob loe loi lok lol loo lor los loz lrb lri lrk lro lrr lrs lrz lsb lse lsi lsk lsl lso lsr lss lsz lzi lzo lzr lzs o-i ob- obb obe obi obk obl obo obr obs oeb oee oei oel oeo oer oes oib oie oii oik oil oio oir ois oiz okb oke oki okk okl oko okr oks olb ole oli olk oll olo ols oo- oob ooi ook ool ooo oor oos or- orb ore ori ork orl oro orr ors orz os- osb ose osi osk osl oso osr oss oze ozo ozs ozz rbb rbe rbi rbk rbl rbo rbr rbs re- reb ree rei rek rel reo rer res rez rib rie rii rik ril rio rir ris riz rkb rke rkk rko rks rkz rle rli rll rlo rlr rls rob roe roi rok rol roo ror ros roz rrb rri rrk rrl rrr rrs rsb rse rsi rsk rsl rso rsr rss rzb rze rzo sbb sbe sbi sbk sbl sbo sbr sbs se- seb see sei sek sel seo ser ses sez sib sie sii sik sil sio sir sis sk- skb ske ski skk skl sko skr sks slb sle sli slk sll slo slr sls sob soe soi sok sol soo sor sos soz sr- srb sre sri srk srl sro srr srs ss- ssb sse ssi ssk ssl sso ssr sss ssz sze szi szl szr zbb zbl zbr zbs zeb zee zek zel zeo zer zes zez zib zie zik zil zio zir zis ziz zks zlr zo- zob zoe zoi zok zol zoo zor zos zrl zro zrs zse zsi zsl zsz zzr zzs zzz