a-a a-b a-i a-t aaa aab aae aai aan aap aas aat ab- aba abb abe abi abn abp abs abt aea aeb aee aei aen aep aes aet ai- aia aib aie aii ain aip ais ait an- ana anb ane ani ann anp ans ant ap- apa apb ape api apn app aps apt as- asa asb ase asi asn asp ass ast at- ata atb ate ati atn atp ats att b-p baa bab bae bai ban bap bas bat bba bbb bbe bbi bbn bbp bbs bbt be- bea beb bee bei ben bep bes bet bi- bia bib bie bii bin bip bis bit bna bnb bne bni bnn bnp bns bnt bpa bpb bpe bpi bpn bpp bps bpt bsa bsb bse bsi bsn bsp bss bst bta btb bte bti btn btp bts btt eaa eab eae eai ean eap eas eat eba ebb ebe ebi ebn ebp ebs ebt eea eeb eee een eep ees eet eia eib eie eii ein eip eis eit en- ena enb ene eni enn enp ens ent ep- epa epb epe epi epn epp eps ept es- esa esb ese esi esn esp ess est eta etb ete eti etn etp ets ett ia- iaa iab iae iai ian iap ias iat iba ibb ibe ibi ibn ibp ibs ibt ie- iea iee iei ien iep ies iet iia iib iie iii iin iip iis iit in- ina inb ine ini inn inp ins int ipa ipb ipe ipi ipn ipp ips ipt is- isa isb ise isi isn isp iss ist ita itb ite iti itn itp its itt n-i naa nab nae nai nan nap nas nat nba nbb nbe nbi nbn nbp nbs nbt ne- nea neb nee nei nen nep nes net nia nib nie nii nin nip nis nit nna nnb nne nni nnn nnp nns nnt npa npb npe npi npn npp nps npt nsa nsb nse nsi nsn nsp nss nst nta ntb nte nti ntn ntp nts ntt p-p paa pab pae pai pan pap pas pat pba pbb pbe pbi pbn pbp pbs pbt pea peb pee pei pen pep pes pet pia pib pie pii pin pip pis pit pn- pna pnb pne pni pnn pnp pns pnt ppa ppb ppe ppi ppn ppp pps ppt ps- psa psb pse psi psn psp pss pst pt- pta ptb pte pti ptn ptp pts ptt saa sab sae sai san sap sas sat sba sbb sbe sbi sbn sbp sbs sbt se- sea seb see sei sen sep ses set sia sib sie sii sin sip sis sit sna snb sne sni snn snp sns snt spa spb spe spi spn spp sps spt ss- ssa ssb sse ssi ssn ssp sss sst sta stb ste sti stn stp sts stt taa tab tae tai tan tap tas tat tba tbb tbe tbi tbn tbp tbs tbt te- tea teb tee tei ten tep tes tet tia tib tie tii tin tip tis tit tna tnb tne tni tnn tnp tns tnt tpa tpb tpe tpi tpn tpp tps tpt tsa tsb tse tsi tsn tsp tss tst tta ttb tte tti ttn ttp tts ttt