-al -er -ol a-a a-b a-i aaa aab aae aai aak aal aao aap aar aas ab- aba abb abe abi abk abl abo abp abr abs aea aeb aee aei aek ael aeo aep aer aes ai- aia aib aie aii aik ail aio aip air ais aka akb ake aki akk akl ako akp akr aks al- ala alb ale ali alk all alo alp alr als aoa aob aoe aoi aok aol aoo aop aor aos ap- apa apb ape api apk apl apo app apr aps ar- ara arb are ari ark arl aro arp arr ars as- asa asb ase asi ask asl aso asp asr ass b-p baa bab bae bai bak bal bao bap bar bas bba bbb bbe bbi bbk bbl bbo bbp bbr bbs be- bea beb bee bei bek bel beo bep ber bes bi- bia bib bie bii bik bil bio bip bir bis bka bkb bke bkk bkl bko bkp bkr bks bla blb ble bli blk bll blo blp blr bls boa bob boe boi bok bol boo bop bor bos bpa bpb bpe bpi bpl bpo bpp bpr bps bra brb bre bri brk brl bro brp brr brs bsa bsb bse bsi bsk bsl bso bsp bsr bss eaa eab eae eai eak eal eao eap ear eas eba ebb ebe ebi ebk ebl ebo ebp ebr ebs eea eeb eee eek eel eeo eep eer ees eia eib eie eii eik eil eio eip eir eis eka ekb eke eki ekl eko ekp ekr eks ela elb ele eli elk ell elo elp elr els eo- eoa eob eoe eoi eok eol eoo eop eor eos ep- epa epb epe epi epl epo epp epr eps era erb ere eri erk erl ero erp err ers es- esa esb ese esi esk esl eso esp esr ess ia- iaa iab iae iai ial iao iap iar ias iba ibb ibe ibi ibk ibl ibo ibp ibr ibs ie- iea iee iei iek iel iep ier ies iia iib iie iii iil iio iip iir iis ika ikb ike iki ikk ikl iko ikr iks il- ila ilb ile ili ilk ill ilo ilp ilr ils io- ioa iob ioe ioi iol ioo iop ior ios ipa ipb ipe ipi ipl ipo ipp ipr ips ir- ira irb ire iri irk irl iro irp irr irs is- isa isb ise isi isk isl iso isp isr iss ka- kaa kab kae kai kak kal kao kap kar kas kba kbb kbe kbi kbk kbl kbo kbp kbr kbs ke- kea keb kee kei kek kel keo kep ker kes kia kib kie kii kik kil kio kip kir kis kkb kke kki kkk kkl kkp kkr kks kl- kla klb kli klo klr kls koa kob koe koi kok kol koo kop kor kos kpa kpe kpi kpk kpl kpo kpp kpr kps kra kri krk krl kro krp krr krs ksa ksb kse ksi ksk ksl kso ksp ksr kss l-p la- laa lab lae lai lak lal lao lap lar las lba lbb lbe lbi lbk lbl lbo lbp lbr lbs lea leb lee lei lek lel leo lep ler les lia lib lie lii lik lil lio lip lir lis lka lkb lkl lkp lkr lks lla llb lle lli llk lll llo llp llr lls loa lob loe loi lok lol loo lop lor los lpa lpb lpe lpi lpk lpl lpo lpp lpr lps lra lrb lri lrk lro lrp lrr lrs lsa lsb lse lsi lsk lsl lso lsp lsr lss o-i oaa oab oae oai oak oal oao oap oar oas ob- oba obb obe obi obk obl obo obp obr obs oea oeb oee oei oel oeo oep oer oes oia oib oie oii oik oil oio oip oir ois oka okb oke oki okk okl oko okp okr oks ola olb ole oli olk oll olo olp ols oo- ooa oob ooi ook ool ooo oop oor oos op- opa opb ope opi opk opl opo opp opr ops or- ora orb ore ori ork orl oro orp orr ors os- osa osb ose osi osk osl oso osp osr oss p-p paa pab pae pai pak pal pao pap par pas pba pbb pbe pbi pbk pbl pbo pbp pbr pbs pea peb pee pei pek pel peo pep per pes pia pib pie pii pik pil pio pip pir pis pka pkb pke pki pkl pko pkp pkr pks pla plb ple pli plk pll plo plp plr pls poa pob poe poi pok pol poo pop por pos ppa ppb ppe ppi ppk ppl ppo ppp ppr pps pra prb pre pri prk prl pro prp prr prs ps- psa psb pse psi psk psl pso psp psr pss ra- raa rab rae rai rak ral rao rap rar ras rba rbb rbe rbi rbk rbl rbo rbp rbr rbs re- rea reb ree rei rek rel reo rep rer res ria rib rie rii rik ril rio rip rir ris rkb rke rkk rko rkp rks rla rle rli rll rlo rlp rlr rls roa rob roe roi rok rol roo rop ror ros rpa rpb rpe rpi rpk rpl rpo rpp rpr rps rra rrb rri rrk rrl rrp rrr rrs rsa rsb rse rsi rsk rsl rso rsp rsr rss saa sab sae sai sak sal sao sap sar sas sba sbb sbe sbi sbk sbl sbo sbp sbr sbs se- sea seb see sei sek sel seo sep ser ses sia sib sie sii sik sil sio sip sir sis sk- ska skb ske ski skk skl sko skp skr sks sla slb sle sli slk sll slo slp slr sls soa sob soe soi sok sol soo sop sor sos spa spb spe spi spk spl spo spp spr sps sr- sra srb sre sri srk srl sro srp srr srs ss- ssa ssb sse ssi ssk ssl