-al -ol a-a a-b aaa aab aae aal aan aao aap aas ab- aba abb abe abl abn abo abp abs aea aeb aee ael aen aeo aep aes al- ala alb ale all aln alo alp als an- ana anb ane anl ann ano anp ans aoa aob aoe aol aon aoo aop aos ap- apa apb ape apl apn apo app aps as- asa asb ase asl asn aso asp ass b-p baa bab bae bal ban bao bap bas bba bbb bbe bbl bbn bbo bbp bbs be- bea beb bee bel ben beo bep bes bla blb ble bll bln blo blp bls bna bnb bne bnl bnn bno bnp bns boa bob boe bol bon boo bop bos bpa bpb bpe bpl bpn bpo bpp bps bsa bsb bse bsl bsn bso bsp bss eaa eab eae eal ean eao eap eas eba ebb ebe ebl ebn ebo ebp ebs eea eeb eee eel een eeo eep ees ela elb ele ell eln elo elp els en- ena enb ene enl enn eno enp ens eo- eoa eob eoe eol eon eoo eop eos ep- epa epb epe epl epn epo epp eps es- esa esb ese esl esn eso esp ess l-p la- laa lab lae lal lan lao lap las lba lbb lbe lbl lbo lbp lbs lea leb lee lel len leo lep les lla llb lle lll lln llo llp lls lna lnb lne lnl lnn lno lnp lns loa lob loe lol lon loo lop los lpa lpb lpe lpl lpn lpo lpp lps lsa lsb lse lsl lsn lso lsp lss naa nab nae nal nan nao nap nas nba nbb nbe nbl nbn nbo nbp nbs ne- nea neb nee nel nen neo nep nes nla nlb nle nll nln nlo nlp nls nna nnb nne nnl nnn nno nnp nns no- noa nob noe nol non noo nop nos npa npb npe npl npn npo npp nps nsa nsb nse nsl nsn nso nsp nss oaa oab oae oal oan oao oap oas ob- oba obb obe obl obn obo obp obs oea oeb oee oel oen oeo oep oes ola olb ole oll oln olo olp ols on- ona onb one onl onn ono onp ons oo- ooa oob ool oon ooo oop oos op- opa opb ope opl opn opo opp ops os- osa osb ose osl osn oso osp oss p-p paa pab pae pal pan pao pap pas pba pbb pbe pbl pbn pbo pbp pbs pea peb pee pel pen peo pep pes pla plb ple pll pln plo plp pls pn- pna pnb pne pnl pnn pno pnp pns poa pob poe pol pon poo pop pos ppa ppb ppe ppl ppn ppo ppp pps ps- psa psb pse psl psn pso psp pss saa sab sae sal san sao sap sas sba sbb sbe sbl sbn sbo sbp sbs se- sea seb see sel sen seo sep ses sla slb sle sll sln slo slp sls sna snb sne snl snn sno snp sns soa sob soe sol son soo sop sos spa spb spe spl spn spo spp sps ss- ssa ssb sse ssl ssn sso ssp sss