a-a aaa aae aaf aak aan aap aas aea aee aef aek aen aep aes af- afa afe aff afk afn afp afs aka ake akk akn akp aks an- ana ane anf ank ann anp ans ap- apa ape apf apk apn app aps as- asa ase asf ask asn asp ass eaa eae eaf eak ean eap eas eea eee eef eek een eep ees ef- efa efe eff efp efs eka eke ekf ekp eks en- ena ene enf enk enn enp ens ep- epa epe epf epn epp eps es- esa ese esf esk esn esp ess faa fae faf fak fan fap fas fea fee fef fek fen fep fes ffa ffe fff ffk ffn ffp ffs fka fkf fkk fkp fna fne fnf fnk fnn fnp fns fpa fpe fpk fpn fpp fps fsa fse fsf fsk fsn fsp fss ka- kaa kae kaf kak kan kap kas ke- kea kee kef kek ken kep kes kfa kff kfs kke kkk kkn kkp kks kn- kna kne knf knk knn knp kpa kpe kpf kpk kpn kpp kps ksa kse ksf ksk ksn ksp kss naa nae naf nak nan nap nas ne- nea nee nef nek nen nep nes nfa nfe nff nfk nfn nfp nfs nka nke nkf nkk nkn nkp nks nna nne nnf nnk nnn nnp nns npa npe npf npn npp nps nsa nse nsf nsk nsn nsp nss p-p paa pae paf pak pan pap pas pea pee pef pek pen pep pes pfa pfe pff pfk pfn pfp pfs pka pke pkf pkn pkp pks pn- pna pne pnf pnk pnn pnp pns ppa ppe ppf ppk ppn ppp pps ps- psa pse psf psk psn psp pss saa sae saf sak san sap sas se- sea see sef sek sen sep ses sfa sfe sff sfk sfn sfp sfs sk- ska ske skf skk skp sks sna sne snf snk snn snp sns spa spe spf spk spn spp sps ss- ssa sse ssf ssk ssn ssp sss