-ic a-a a-b a-c a-i a-t aaa aab aac aai aan aap aas aat ab- aba abb abc abi abn abp abs abt ac- aca acb acc aci acn acp acs act ai- aia aib aic aii ain aip ais ait an- ana anb anc ani ann anp ans ant ap- apa apb apc api apn app aps apt as- asa asb asc asi asn asp ass ast at- ata atb atc ati atn atp ats att b-p baa bab bac bai ban bap bas bat bba bbb bbc bbi bbn bbp bbs bbt bca bcb bcc bci bcn bcp bcs bct bi- bia bib bic bii bin bip bis bit bna bnb bnc bni bnn bnp bns bnt bpa bpb bpc bpi bpn bpp bps bpt bsa bsb bsc bsi bsn bsp bss bst bta btb btc bti btn btp bts btt c-- caa cab cac cai can cap cas cat cba cbb cbc cbi cbn cbp cbs cbt cca ccb ccc cci ccn ccp ccs cct ci- cia cib cic cii cin cip cis cit cn- cna cnb cnc cni cnn cnp cns cnt cpa cpb cpc cpi cpn cpp cps cpt csa csb csc csi csn csp css cst cta ctb ctc cti ctn ctp cts ctt ia- iaa iab iac iai ian iap ias iat iba ibb ibc ibi ibn ibp ibs ibt ica icb icc ici icn icp ics ict iia iib iic iii iin iip iis iit in- ina inb inc ini inn inp ins int ipa ipb ipc ipi ipn ipp ips ipt is- isa isb isc isi isn isp iss ist ita itb itc iti itn itp its itt n-i naa nab nac nai nan nap nas nat nba nbb nbc nbi nbn nbp nbs nbt nca ncb ncc nci ncn ncp ncs nct nia nib nic nii nin nip nis nit nna nnb nnc nni nnn nnp nns nnt npa npb npc npi npn npp nps npt nsa nsb nsc nsi nsn nsp nss nst nta ntb ntc nti ntn ntp nts ntt p-p paa pab pac pai pan pap pas pat pba pbb pbc pbi pbn pbp pbs pbt pca pcb pcc pci pcn pcp pcs pct pia pib pic pii pin pip pis pit pn- pna pnb pnc pni pnn pnp pns pnt ppa ppb ppc ppi ppn ppp pps ppt ps- psa psb psc psi psn psp pss pst pt- pta ptb ptc pti ptn ptp pts ptt saa sab sac sai san sap sas sat sba sbb sbc sbi sbn sbp sbs sbt sca scb scc sci scn scp scs sct sia sib sic sii sin sip sis sit sna snb snc sni snn snp sns snt spa spb spc spi spn spp sps spt ss- ssa ssb ssc ssi ssn ssp sss sst sta stb stc sti stn stp sts stt taa tab tac tai tan tap tas tat tba tbb tbc tbi tbn tbp tbs tbt tca tcb tcc tci tcn tcp tcs tct tia tib tic tii tin tip tis tit tna tnb tnc tni tnn tnp tns tnt tpa tpb tpc tpi tpn tpp tps tpt tsa tsb tsc tsi tsn tsp tss tst tta ttb ttc tti ttn ttp tts ttt