-ic a-a a-b a-c a-i a-t aaa aab aac aae aai aak aan aap aas aat ab- aba abb abc abe abi abk abn abp abs abt ac- aca acb acc ace aci ack acn acp acs act aea aeb aec aee aei aek aen aep aes aet ai- aia aib aic aie aii aik ain aip ais ait aka akb akc ake aki akk akn akp aks an- ana anb anc ane ani ank ann anp ans ant ap- apa apb apc ape api apk apn app aps apt as- asa asb asc ase asi ask asn asp ass ast at- ata atb atc ate ati atn atp ats att b-p baa bab bac bae bai bak ban bap bas bat bba bbb bbc bbe bbi bbk bbn bbp bbs bbt bca bcb bcc bce bci bck bcn bcp bcs bct be- bea beb bec bee bei bek ben bep bes bet bi- bia bib bic bie bii bik bin bip bis bit bka bkb bkc bke bkk bkn bkp bks bkt bna bnb bnc bne bni bnk bnn bnp bns bnt bpa bpb bpc bpe bpi bpn bpp bps bpt bsa bsb bsc bse bsi bsk bsn bsp bss bst bta btb btc bte bti btk btn btp bts btt c-- caa cab cac cae cai cak can cap cas cat cba cbb cbc cbe cbi cbk cbn cbp cbs cbt cca ccb ccc cce cci cck ccn ccp ccs cct ce- cea ceb cec cee cei cek cen cep ces cet ci- cia cib cic cie cii cik cin cip cis cit cka ckb ckc cki cks ckt cn- cna cnb cnc cne cni cnn cnp cns cnt cpa cpb cpc cpe cpi cpk cpn cpp cps cpt csa csb csc cse csi csk csn csp css cst cta ctb ctc cte cti ctk ctn ctp cts ctt eaa eab eac eae eai eak ean eap eas eat eba ebb ebc ebe ebi ebk ebn ebp ebs ebt ec- eca ecb ecc ece eci eck ecn ecs ect eea eeb eec eee eek een eep ees eet eia eib eic eie eii eik ein eip eis eit eka ekb ekc eke eki ekp eks ekt en- ena enb enc ene eni enk enn enp ens ent ep- epa epb epc epe epi epn epp eps ept es- esa esb esc ese esi esk esn esp ess est eta etb etc ete eti etk etn etp ets ett ia- iaa iab iac iae iai ian iap ias iat iba ibb ibc ibe ibi ibk ibn ibp ibs ibt ica icb icc ice ici ick icn icp ics ict ie- iea iec iee iei iek ien iep ies iet iia iib iic iie iii iin iip iis iit ika ikb ikc ike iki ikk iks ikt in- ina inb inc ine ini ink inn inp ins int ipa ipb ipc ipe ipi ipn ipp ips ipt is- isa isb isc ise isi isk isn isp iss ist ita itb itc ite iti itk itn itp its itt k-t ka- kaa kab kac kae kai kak kan kap kas kat kba kbb kbc kbe kbi kbk kbn kbp kbs kca kcb kcc kce kci kck kcn kcp kcs kct ke- kea keb kec kee kei kek ken kep kes ket kia kib kic kie kii kik kin kip kis kit kkb kkc kke kki kkk kkn kkp kks kkt kn- kna knc kne kni knk knn knp knt kpa kpc kpe kpi kpk kpn kpp kps kpt ksa ksb ksc kse ksi ksk ksn ksp kss kst kta ktb ktc kte ktk ktn ktp kts ktt n-i naa nab nac nae nai nak nan nap nas nat nba nbb nbc nbe nbi nbk nbn nbp nbs nbt nca ncb ncc nce nci nck ncn ncp ncs nct ne- nea neb nec nee nei nek nen nep nes net nia nib nic nie nii nik nin nip nis nit nka nkc nke nki nkk nkn nkp nks nkt nna nnb nnc nne nni nnk nnn nnp nns nnt npa npb npc npe npi npn npp nps npt nsa nsb nsc nse nsi nsk nsn nsp nss nst nta ntb ntc nte nti ntk ntn ntp nts ntt p-p paa pab pac pae pai pak pan pap pas pat pba pbb pbc pbe pbi pbk pbn pbp pbs pbt pca pcb pcc pce pci pck pcn pcp pcs pct pea peb pec pee pei pek pen pep pes pet pia pib pic pie pii pik pin pip pis pit pka pkb pkc pke pki pkn pkp pks pkt pn- pna pnb pnc pne pni pnk pnn pnp pns pnt ppa ppb ppc ppe ppi ppk ppn ppp pps ppt ps- psa psb psc pse psi psk psn psp pss pst pt- pta ptb ptc pte pti ptk ptn ptp pts ptt saa sab sac sae sai sak san sap sas sat sba sbb sbc sbe sbi sbk sbn sbp sbs sbt sca scb scc sce sci sck scn scp scs sct se- sea seb sec see sei sek sen sep ses set sia sib sic sie sii sik sin sip sis sit sk- ska skb skc ske ski skk skp sks skt sna snb snc sne sni snk snn snp sns snt spa spb spc spe spi spk spn spp sps spt ss- ssa ssb ssc sse ssi ssk ssn ssp sss sst sta stb stc ste sti stk stn stp sts stt taa tab tac tae tai tak tan tap tas tat tba tbb tbc tbe tbi tbk tbn tbp tbs tbt tca tcb tcc tce tci tck tcn tcp tcs tct te- tea teb tec tee tei tek ten tep tes tet tia tib tic tie tii tik tin tip tis tit tka tkb tkc tke tkk tkp tks tkt tna tnb tnc tne tni tnk tnn tnp tns tnt tpa tpb tpc tpe tpi tpk tpn tpp tps tpt tsa tsb tsc tse tsi tsk tsn tsp tss tst