-al a-a a-b a-c a-t aaa aab aac aae aal aan aap aas aat ab- aba abb abc abe abl abn abp abs abt ac- aca acb acc ace acl acn acp acs act aea aeb aec aee ael aen aep aes aet al- ala alb alc ale all aln alp als alt an- ana anb anc ane anl ann anp ans ant ap- apa apb apc ape apl apn app aps apt as- asa asb asc ase asl asn asp ass ast at- ata atb atc ate atl atn atp ats att b-p baa bab bac bae bal ban bap bas bat bba bbb bbc bbe bbl bbn bbp bbs bbt bca bcb bcc bce bcl bcn bcp bcs bct be- bea beb bec bee bel ben bep bes bet bla blb blc ble bll bln blp bls blt bna bnb bnc bne bnl bnn bnp bns bnt bpa bpb bpc bpe bpl bpn bpp bps bpt bsa bsb bsc bse bsl bsn bsp bss bst bta btb btc bte btl btn btp bts btt c-- caa cab cac cae cal can cap cas cat cba cbb cbc cbe cbl cbn cbp cbs cbt cca ccb ccc cce ccl ccn ccp ccs cct ce- cea ceb cec cee cel cen cep ces cet cl- cla clb clc cle cll cln clp cls clt cn- cna cnb cnc cne cnl cnn cnp cns cnt cpa cpb cpc cpe cpl cpn cpp cps cpt csa csb csc cse csl csn csp css cst cta ctb ctc cte ctl ctn ctp cts ctt eaa eab eac eae eal ean eap eas eat eba ebb ebc ebe ebl ebn ebp ebs ebt ec- eca ecb ecc ece ecl ecn ecs ect eea eeb eec eee eel een eep ees eet ela elb elc ele ell eln elp els elt en- ena enb enc ene enl enn enp ens ent ep- epa epb epc epe epl epn epp eps ept es- esa esb esc ese esl esn esp ess est eta etb etc ete etl etn etp ets ett l-p la- laa lab lac lae lal lan lap las lat lba lbb lbc lbe lbl lbp lbs lbt lca lcb lcc lce lcl lcn lcp lcs lct lea leb lec lee lel len lep les let lla llb llc lle lll lln llp lls llt lna lnb lnc lne lnl lnn lnp lns lnt lpa lpb lpc lpe lpl lpn lpp lps lpt lsa lsb lsc lse lsl lsn lsp lss lst lta ltb ltc lte ltl ltp lts ltt naa nab nac nae nal nan nap nas nat nba nbb nbc nbe nbl nbn nbp nbs nbt nca ncb ncc nce ncl ncn ncp ncs nct ne- nea neb nec nee nel nen nep nes net nla nlb nlc nle nll nln nlp nls nlt nna nnb nnc nne nnl nnn nnp nns nnt npa npb npc npe npl npn npp nps npt nsa nsb nsc nse nsl nsn nsp nss nst nta ntb ntc nte ntn ntp nts ntt p-p paa pab pac pae pal pan pap pas pat pba pbb pbc pbe pbl pbn pbp pbs pbt pca pcb pcc pce pcl pcn pcp pcs pct pea peb pec pee pel pen pep pes pet pla plb plc ple pll pln plp pls plt pn- pna pnb pnc pne pnl pnn pnp pns pnt ppa ppb ppc ppe ppl ppn ppp pps ppt ps- psa psb psc pse psl psn psp pss pst pt- pta ptb ptc pte ptl ptn ptp pts ptt saa sab sac sae sal san sap sas sat sba sbb sbc sbe sbl sbn sbp sbs sbt sca scb scc sce scl scn scp scs sct se- sea seb sec see sel sen sep ses set sla slb slc sle sll sln slp sls slt sna snb snc sne snl snn snp sns snt spa spb spc spe spl spn spp sps spt ss- ssa ssb ssc sse ssl ssn ssp sss sst sta stb stc ste stl stn stp sts stt taa tab tac tae tal tan tap tas tat tba tbb tbc tbe tbl tbn tbp tbs tbt tca tcb tcc tce tcl tcn tcp tcs tct te- tea teb tec tee tel ten tep tes tet tla tlc tle tll tln tlp tls tlt tna tnb tnc tne tnl tnn tnp tns tnt tpa tpb tpc tpe tpl tpn tpp tps tpt tsa tsb tsc tse tsl tsn tsp tss tst tta ttb ttc tte ttl ttn ttp tts ttt