-al -ol a-a a-b aaa aab aae aaf aal aao aap aas ab- aba abb abe abf abl abo abp abs aea aeb aee aef ael aeo aep aes af- afa afb afe aff afl afo afp afs al- ala alb ale alf all alo alp als aoa aob aoe aof aol aoo aop aos ap- apa apb ape apf apl apo app aps as- asa asb ase asf asl aso asp ass b-p baa bab bae baf bal bao bap bas bba bbb bbe bbf bbl bbo bbp bbs be- bea beb bee bef bel beo bep bes bfa bfb bfe bff bfl bfo bfp bfs bla blb ble blf bll blo blp bls boa bob boe bof bol boo bop bos bpa bpb bpe bpf bpl bpo bpp bps bsa bsb bse bsf bsl bso bsp bss eaa eab eae eaf eal eao eap eas eba ebb ebe ebf ebl ebo ebp ebs eea eeb eee eef eel eeo eep ees ef- efa efb efe eff efl efo efp efs ela elb ele elf ell elo elp els eo- eoa eob eoe eof eol eoo eop eos ep- epa epb epe epf epl epo epp eps es- esa esb ese esf esl eso esp ess faa fab fae faf fal fao fap fas fba fbb fbe fbf fbl fbo fbp fbs fea feb fee fef fel feo fep fes ffa ffe fff ffl ffo ffp ffs fla flb fle flf fll flo flp fls foa fob foe fof fol foo fop fos fpa fpb fpe fpl fpo fpp fps fsa fsb fse fsf fsl fso fsp fss l-p la- laa lab lae laf lal lao lap las lba lbb lbe lbf lbl lbo lbp lbs lea leb lee lef lel leo lep les lfa lfb lfe lff lfl lfo lfp lfs lla llb lle llf lll llo llp lls loa lob loe lof lol loo lop los lpa lpb lpe lpf lpl lpo lpp lps lsa lsb lse lsf lsl lso lsp lss oaa oab oae oaf oal oao oap oas ob- oba obb obe obf obl obo obp obs oea oeb oee oef oel oeo oep oes of- ofa ofb ofe off ofl ofo ofp ofs ola olb ole olf oll olo olp ols oo- ooa oob oof ool ooo oop oos op- opa opb ope opf opl opo opp ops os- osa osb ose osf osl oso osp oss p-p paa pab pae paf pal pao pap pas pba pbb pbe pbf pbl pbo pbp pbs pea peb pee pef pel peo pep pes pfa pfb pfe pff pfl pfo pfp pfs pla plb ple plf pll plo plp pls poa pob poe pof pol poo pop pos ppa ppb ppe ppf ppl ppo ppp pps ps- psa psb pse psf psl pso psp pss saa sab sae saf sal sao sap sas sba sbb sbe sbf sbl sbo sbp sbs se- sea seb see sef sel seo sep ses sfa sfb sfe sff sfl sfo sfp sfs sla slb sle slf sll slo slp sls soa sob soe sof sol soo sop sos spa spb spe spf spl spo spp sps ss- ssa ssb sse ssf ssl sso ssp sss