-er -ol b-p bbb bbe bbi bbk bbl bbo bbp bbr bbs be- beb bee bei bek bel beo bep ber bes bi- bib bie bii bik bil bio bip bir bis bkb bke bkk bkl bko bkp bkr bks blb ble bli blk bll blo blp blr bls bob boe boi bok bol boo bop bor bos bpb bpe bpi bpl bpo bpp bpr bps brb bre bri brk brl bro brp brr brs bsb bse bsi bsk bsl bso bsp bsr bss ebb ebe ebi ebk ebl ebo ebp ebr ebs eeb eee eek eel eeo eep eer ees eib eie eii eik eil eio eip eir eis ekb eke eki ekl eko ekp ekr eks elb ele eli elk ell elo elp elr els eo- eob eoe eoi eok eol eoo eop eor eos ep- epb epe epi epl epo epp epr eps erb ere eri erk erl ero erp err ers es- esb ese esi esk esl eso esp esr ess ibb ibe ibi ibk ibl ibo ibp ibr ibs ie- iee iei iek iel iep ier ies iib iie iii iil iio iip iir iis ikb ike iki ikk ikl iko ikr iks il- ilb ile ili ilk ill ilo ilp ilr ils io- iob ioe ioi iol ioo iop ior ios ipb ipe ipi ipl ipo ipp ipr ips ir- irb ire iri irk irl iro irp irr irs is- isb ise isi isk isl iso isp isr iss kbb kbe kbi kbk kbl kbo kbp kbr kbs ke- keb kee kei kek kel keo kep ker kes kib kie kii kik kil kio kip kir kis kkb kke kki kkk kkl kkp kkr kks kl- klb kli klo klr kls kob koe koi kok kol koo kop kor kos kpe kpi kpk kpl kpo kpp kpr kps kri krk krl kro krp krr krs ksb kse ksi ksk ksl kso ksp ksr kss l-p lbb lbe lbi lbk lbl lbo lbp lbr lbs leb lee lei lek lel leo lep ler les lib lie lii lik lil lio lip lir lis lkb lkl lkp lkr lks llb lle lli llk lll llo llp llr lls lob loe loi lok lol loo lop lor los lpb lpe lpi lpk lpl lpo lpp lpr lps lrb lri lrk lro lrp lrr lrs lsb lse lsi lsk lsl lso lsp lsr lss o-i ob- obb obe obi obk obl obo obp obr obs oeb oee oei oel oeo oep oer oes oib oie oii oik oil oio oip oir ois okb oke oki okk okl oko okp okr oks olb ole oli olk oll olo olp ols oo- oob ooi ook ool ooo oop oor oos op- opb ope opi opk opl opo opp opr ops or- orb ore ori ork orl oro orp orr ors os- osb ose osi osk osl oso osp osr oss p-p pbb pbe pbi pbk pbl pbo pbp pbr pbs peb pee pei pek pel peo pep per pes pib pie pii pik pil pio pip pir pis pkb pke pki pkl pko pkp pkr pks plb ple pli plk pll plo plp plr pls pob poe poi pok pol poo pop por pos ppb ppe ppi ppk ppl ppo ppp ppr pps prb pre pri prk prl pro prp prr prs ps- psb pse psi psk psl pso psp psr pss rbb rbe rbi rbk rbl rbo rbp rbr rbs re- reb ree rei rek rel reo rep rer res rib rie rii rik ril rio rip rir ris rkb rke rkk rko rkp rks rle rli rll rlo rlp rlr rls rob roe roi rok rol roo rop ror ros rpb rpe rpi rpk rpl rpo rpp rpr rps rrb rri rrk rrl rrp rrr rrs rsb rse rsi rsk rsl rso rsp rsr rss sbb sbe sbi sbk sbl sbo sbp sbr sbs se- seb see sei sek sel seo sep ser ses sib sie sii sik sil sio sip sir sis sk- skb ske ski skk skl sko skp skr sks slb sle sli slk sll slo slp slr sls sob soe soi sok sol soo sop sor sos spb spe spi spk spl spo spp spr sps sr- srb sre sri srk srl sro srp srr srs ss- ssb sse ssi ssk ssl sso ssp ssr sss