-ic a-a a-b a-c a-i a-t aaa aab aac aai aak aap aas aat ab- aba abb abc abi abk abp abs abt ac- aca acb acc aci ack acp acs act ai- aia aib aic aii aik aip ais ait aka akb akc aki akk akp aks ap- apa apb apc api apk app aps apt as- asa asb asc asi ask asp ass ast at- ata atb atc ati atp ats att b-p baa bab bac bai bak bap bas bat bba bbb bbc bbi bbk bbp bbs bbt bca bcb bcc bci bck bcp bcs bct bi- bia bib bic bii bik bip bis bit bka bkb bkc bkk bkp bks bkt bpa bpb bpc bpi bpp bps bpt bsa bsb bsc bsi bsk bsp bss bst bta btb btc bti btk btp bts btt c-- caa cab cac cai cak cap cas cat cba cbb cbc cbi cbk cbp cbs cbt cca ccb ccc cci cck ccp ccs cct ci- cia cib cic cii cik cip cis cit cka ckb ckc cki cks ckt cpa cpb cpc cpi cpk cpp cps cpt csa csb csc csi csk csp css cst cta ctb ctc cti ctk ctp cts ctt ia- iaa iab iac iai iap ias iat iba ibb ibc ibi ibk ibp ibs ibt ica icb icc ici ick icp ics ict iia iib iic iii iip iis iit ika ikb ikc iki ikk iks ikt ipa ipb ipc ipi ipp ips ipt is- isa isb isc isi isk isp iss ist ita itb itc iti itk itp its itt k-t ka- kaa kab kac kai kak kap kas kat kba kbb kbc kbi kbk kbp kbs kca kcb kcc kci kck kcp kcs kct kia kib kic kii kik kip kis kit kkb kkc kki kkk kkp kks kkt kpa kpc kpi kpk kpp kps kpt ksa ksb ksc ksi ksk ksp kss kst kta ktb ktc ktk ktp kts ktt p-p paa pab pac pai pak pap pas pat pba pbb pbc pbi pbk pbp pbs pbt pca pcb pcc pci pck pcp pcs pct pia pib pic pii pik pip pis pit pka pkb pkc pki pkp pks pkt ppa ppb ppc ppi ppk ppp pps ppt ps- psa psb psc psi psk psp pss pst pt- pta ptb ptc pti ptk ptp pts ptt saa sab sac sai sak sap sas sat sba sbb sbc sbi sbk sbp sbs sbt sca scb scc sci sck scp scs sct sia sib sic sii sik sip sis sit sk- ska skb skc ski skk skp sks skt spa spb spc spi spk spp sps spt ss- ssa ssb ssc ssi ssk ssp sss sst sta stb stc sti stk stp sts stt taa tab tac tai tak tap tas tat tba tbb tbc tbi tbk tbp tbs tbt tca tcb tcc tci tck tcp tcs tct tia tib tic tii tik tip tis tit tka tkb tkc tkk tkp tks tkt tpa tpb tpc tpi tpk tpp tps tpt tsa tsb tsc tsi tsk tsp tss tst tta ttb ttc tti ttk ttp tts ttt