-al a-a a-b a-c aaa aab aac aae aak aal aan aap aas ab- aba abb abc abe abk abl abn abp abs ac- aca acb acc ace ack acl acn acp acs aea aeb aec aee aek ael aen aep aes aka akb akc ake akk akl akn akp aks al- ala alb alc ale alk all aln alp als an- ana anb anc ane ank anl ann anp ans ap- apa apb apc ape apk apl apn app aps as- asa asb asc ase ask asl asn asp ass b-p baa bab bac bae bak bal ban bap bas bba bbb bbc bbe bbk bbl bbn bbp bbs bca bcb bcc bce bck bcl bcn bcp bcs be- bea beb bec bee bek bel ben bep bes bka bkb bkc bke bkk bkl bkn bkp bks bla blb blc ble blk bll bln blp bls bna bnb bnc bne bnk bnl bnn bnp bns bpa bpb bpc bpe bpl bpn bpp bps bsa bsb bsc bse bsk bsl bsn bsp bss c-- caa cab cac cae cak cal can cap cas cba cbb cbc cbe cbk cbl cbn cbp cbs cca ccb ccc cce cck ccl ccn ccp ccs ce- cea ceb cec cee cek cel cen cep ces cka ckb ckc cks cl- cla clb clc cle clk cll cln clp cls cn- cna cnb cnc cne cnl cnn cnp cns cpa cpb cpc cpe cpk cpl cpn cpp cps csa csb csc cse csk csl csn csp css eaa eab eac eae eak eal ean eap eas eba ebb ebc ebe ebk ebl ebn ebp ebs ec- eca ecb ecc ece eck ecl ecn ecs eea eeb eec eee eek eel een eep ees eka ekb ekc eke ekl ekp eks ela elb elc ele elk ell eln elp els en- ena enb enc ene enk enl enn enp ens ep- epa epb epc epe epl epn epp eps es- esa esb esc ese esk esl esn esp ess ka- kaa kab kac kae kak kal kan kap kas kba kbb kbc kbe kbk kbl kbn kbp kbs kca kcb kcc kce kck kcl kcn kcp kcs ke- kea keb kec kee kek kel ken kep kes kkb kkc kke kkk kkl kkn kkp kks kl- kla klb klc kls kn- kna knc kne knk knl knn knp kpa kpc kpe kpk kpl kpn kpp kps ksa ksb ksc kse ksk ksl ksn ksp kss l-p la- laa lab lac lae lak lal lan lap las lba lbb lbc lbe lbk lbl lbp lbs lca lcb lcc lce lck lcl lcn lcp lcs lea leb lec lee lek lel len lep les lka lkb lkl lkp lks lla llb llc lle llk lll lln llp lls lna lnb lnc lne lnk lnl lnn lnp lns lpa lpb lpc lpe lpk lpl lpn lpp lps lsa lsb lsc lse lsk lsl lsn lsp lss naa nab nac nae nak nal nan nap nas nba nbb nbc nbe nbk nbl nbn nbp nbs nca ncb ncc nce nck ncl ncn ncp ncs ne- nea neb nec nee nek nel nen nep nes nka nkc nke nkk nkn nkp nks nla nlb nlc nle nlk nll nln nlp nls nna nnb nnc nne nnk nnl nnn nnp nns npa npb npc npe npl npn npp nps nsa nsb nsc nse nsk nsl nsn nsp nss p-p paa pab pac pae pak pal pan pap pas pba pbb pbc pbe pbk pbl pbn pbp pbs pca pcb pcc pce pck pcl pcn pcp pcs pea peb pec pee pek pel pen pep pes pka pkb pkc pke pkl pkn pkp pks pla plb plc ple plk pll pln plp pls pn- pna pnb pnc pne pnk pnl pnn pnp pns ppa ppb ppc ppe ppk ppl ppn ppp pps ps- psa psb psc pse psk psl psn psp pss saa sab sac sae sak sal san sap sas sba sbb sbc sbe sbk sbl sbn sbp sbs sca scb scc sce sck scl scn scp scs se- sea seb sec see sek sel sen sep ses sk- ska skb skc ske skk skl skp sks sla slb slc sle slk sll sln slp sls sna snb snc sne snk snl snn snp sns spa spb spc spe spk spl spn spp sps ss- ssa ssb ssc sse ssk ssl ssn ssp sss