-ic a-a a-b a-c a-i a-t aaa aab aac aae aai aan aap aas aat ab- aba abb abc abe abi abn abp abs abt ac- aca acb acc ace aci acn acp acs act aea aeb aec aee aei aen aep aes aet ai- aia aib aic aie aii ain aip ais ait an- ana anb anc ane ani ann anp ans ant ap- apa apb apc ape api apn app aps apt as- asa asb asc ase asi asn asp ass ast at- ata atb atc ate ati atn atp ats att b-p baa bab bac bae bai ban bap bas bat bba bbb bbc bbe bbi bbn bbp bbs bbt bca bcb bcc bce bci bcn bcp bcs bct be- bea beb bec bee bei ben bep bes bet bi- bia bib bic bie bii bin bip bis bit bna bnb bnc bne bni bnn bnp bns bnt bpa bpb bpc bpe bpi bpn bpp bps bpt bsa bsb bsc bse bsi bsn bsp bss bst bta btb btc bte bti btn btp bts btt c-- caa cab cac cae cai can cap cas cat cba cbb cbc cbe cbi cbn cbp cbs cbt cca ccb ccc cce cci ccn ccp ccs cct ce- cea ceb cec cee cei cen cep ces cet ci- cia cib cic cie cii cin cip cis cit cn- cna cnb cnc cne cni cnn cnp cns cnt cpa cpb cpc cpe cpi cpn cpp cps cpt csa csb csc cse csi csn csp css cst cta ctb ctc cte cti ctn ctp cts ctt eaa eab eac eae eai ean eap eas eat eba ebb ebc ebe ebi ebn ebp ebs ebt ec- eca ecb ecc ece eci ecn ecs ect eea eeb eec eee een eep ees eet eia eib eic eie eii ein eip eis eit en- ena enb enc ene eni enn enp ens ent ep- epa epb epc epe epi epn epp eps ept es- esa esb esc ese esi esn esp ess est eta etb etc ete eti etn etp ets ett ia- iaa iab iac iae iai ian iap ias iat iba ibb ibc ibe ibi ibn ibp ibs ibt ica icb icc ice ici icn icp ics ict ie- iea iec iee iei ien iep ies iet iia iib iic iie iii iin iip iis iit in- ina inb inc ine ini inn inp ins int ipa ipb ipc ipe ipi ipn ipp ips ipt is- isa isb isc ise isi isn isp iss ist ita itb itc ite iti itn itp its itt n-i naa nab nac nae nai nan nap nas nat nba nbb nbc nbe nbi nbn nbp nbs nbt nca ncb ncc nce nci ncn ncp ncs nct ne- nea neb nec nee nei nen nep nes net nia nib nic nie nii nin nip nis nit nna nnb nnc nne nni nnn nnp nns nnt npa npb npc npe npi npn npp nps npt nsa nsb nsc nse nsi nsn nsp nss nst nta ntb ntc nte nti ntn ntp nts ntt p-p paa pab pac pae pai pan pap pas pat pba pbb pbc pbe pbi pbn pbp pbs pbt pca pcb pcc pce pci pcn pcp pcs pct pea peb pec pee pei pen pep pes pet pia pib pic pie pii pin pip pis pit pn- pna pnb pnc pne pni pnn pnp pns pnt ppa ppb ppc ppe ppi ppn ppp pps ppt ps- psa psb psc pse psi psn psp pss pst pt- pta ptb ptc pte pti ptn ptp pts ptt saa sab sac sae sai san sap sas sat sba sbb sbc sbe sbi sbn sbp sbs sbt sca scb scc sce sci scn scp scs sct se- sea seb sec see sei sen sep ses set sia sib sic sie sii sin sip sis sit sna snb snc sne sni snn snp sns snt spa spb spc spe spi spn spp sps spt ss- ssa ssb ssc sse ssi ssn ssp sss sst sta stb stc ste sti stn stp sts stt taa tab tac tae tai tan tap tas tat tba tbb tbc tbe tbi tbn tbp tbs tbt tca tcb tcc tce tci tcn tcp tcs tct te- tea teb tec tee tei ten tep tes tet tia tib tic tie tii tin tip tis tit tna tnb tnc tne tni tnn tnp tns tnt tpa tpb tpc tpe tpi tpn tpp tps tpt tsa tsb tsc tse tsi tsn tsp tss tst tta ttb ttc tte tti ttn ttp tts ttt