-ic a-a a-b a-c a-i aaa aab aac aai aak aam aas ab- aba abb abc abi abk abm abs ac- aca acb acc aci ack acm acs ai- aia aib aic aii aik aim ais aka akb akc aki akk akm aks ama amb amc ami amk amm ams as- asa asb asc asi ask asm ass baa bab bac bai bak bam bas bba bbb bbc bbi bbk bbm bbs bca bcb bcc bci bck bcm bcs bi- bia bib bic bii bik bim bis bka bkb bkc bkk bkm bks bma bmb bmc bmi bmk bmm bms bsa bsb bsc bsi bsk bsm bss c-- caa cab cac cai cak cam cas cba cbb cbc cbi cbk cbm cbs cca ccb ccc cci cck ccm ccs ci- cia cib cic cii cik cim cis cka ckb ckc cki ckm cks cma cmb cmc cmi cmk cmm cms csa csb csc csi csk csm css ia- iaa iab iac iai iam ias iba ibb ibc ibi ibk ibm ibs ica icb icc ici ick icm ics iia iib iic iii iim iis ika ikb ikc iki ikk iks im- ima imb imc imi imm ims is- isa isb isc isi isk ism iss ka- kaa kab kac kai kak kam kas kba kbb kbc kbi kbk kbm kbs kca kcb kcc kci kck kcm kcs kia kib kic kii kik kim kis kkb kkc kki kkk kkm kks kma kmb kmc kmi kmk kmm kms ksa ksb ksc ksi ksk ksm kss maa mab mac mai mak mam mas mba mbb mbc mbi mbk mbm mbs mc- mca mcb mcc mci mck mcm mcs mi- mia mib mic mii mik mim mis mka mkb mkc mkk mkm mks mma mmb mmc mmi mmk mmm mms msa msb msc msi msk msm mss saa sab sac sai sak sam sas sba sbb sbc sbi sbk sbm sbs sca scb scc sci sck scm scs sia sib sic sii sik sim sis sk- ska skb skc ski skk skm sks sma smb smc smi smk smm sms ss- ssa ssb ssc ssi ssk ssm sss