-ic a-a a-b a-c a-i aaa aab aac aaf aah aai aak aas ab- aba abb abc abf abh abi abk abs ac- aca acb acc acf ach aci ack acs af- afa afb afc aff afh afi afk afs aha ahb ahc ahf ahh ahi ahk ahs ai- aia aib aic aif aih aii aik ais aka akb akc akh aki akk aks as- asa asb asc asf ash asi ask ass baa bab bac baf bah bai bak bas bba bbb bbc bbf bbh bbi bbk bbs bca bcb bcc bcf bch bci bck bcs bfa bfb bfc bff bfh bfi bfs bha bhb bhc bhf bhh bhi bhk bhs bi- bia bib bic bif bih bii bik bis bka bkb bkc bkf bkk bks bsa bsb bsc bsf bsh bsi bsk bss c-- caa cab cac caf cah cai cak cas cba cbb cbc cbf cbh cbi cbk cbs cca ccb ccc ccf cch cci cck ccs cfa cfb cfc cff cfh cfi cfk cfs ch- cha chb chc chf chh chi chk chs ci- cia cib cic cif cih cii cik cis cka ckb ckc ckh cki cks csa csb csc csf csh csi csk css faa fab fac faf fah fai fak fas fba fbb fbc fbf fbh fbi fbk fbs fca fcb fcc fcf fci fck fcs ffa ffc fff ffh ffi ffk ffs fha fhb fhc fhf fhh fhi fhs fia fib fic fif fih fii fik fis fka fkb fkc fkf fki fkk fsa fsb fsc fsf fsh fsi fsk fss h-i haa hab hac haf hah hai hak has hba hbb hbc hbf hbh hbi hbk hbs hca hcb hcc hcf hch hci hck hcs hfa hfb hfc hff hfh hfi hfk hfs hha hhb hhc hhf hhh hhi hhk hhs hia hib hic hif hih hii hik his hka hkb hkf hkh hki hkk hks hsa hsb hsc hsf hsh hsi hsk hss i-f ia- iaa iab iac iaf iah iai ias iba ibb ibc ibf ibh ibi ibk ibs ica icb icc icf ich ici ick ics ifa ifb ifc iff ifi ifs iha ihb ihc ihf ihh ihi ihk ihs iia iib iic iif iih iii iis ika ikb ikc ikf iki ikk iks is- isa isb isc isf ish isi isk iss ka- kaa kab kac kaf kah kai kak kas kba kbb kbc kbf kbh kbi kbk kbs kca kcb kcc kch kci kck kcs kfa kfc kff kfh kfi kfs kha khf khh khi khk khs kia kib kic kif kih kii kik kis kkb kkc kkh kki kkk kks ksa ksb ksc ksf ksh ksi ksk kss saa sab sac saf sah sai sak sas sba sbb sbc sbf sbh sbi sbk sbs sca scb scc scf sch sci sck scs sfa sfb sfc sff sfh sfi sfk sfs sh- sha shb shc shf shh shi shk shs sia sib sic sif sih sii sik sis sk- ska skb skc skf skh ski skk sks ss- ssa ssb ssc ssf ssh ssi ssk sss