-ic a-a a-b a-c a-i aaa aab aac aae aaf aah aai aak aas ab- aba abb abc abe abf abh abi abk abs ac- aca acb acc ace acf ach aci ack acs aea aeb aec aee aef aeh aei aek aes af- afa afb afc afe aff afh afi afk afs aha ahb ahc ahe ahf ahh ahi ahk ahs ai- aia aib aic aie aif aih aii aik ais aka akb akc ake akh aki akk aks as- asa asb asc ase asf ash asi ask ass baa bab bac bae baf bah bai bak bas bba bbb bbc bbe bbf bbh bbi bbk bbs bca bcb bcc bce bcf bch bci bck bcs be- bea beb bec bee bef beh bei bek bes bfa bfb bfc bfe bff bfh bfi bfs bha bhb bhc bhe bhf bhh bhi bhk bhs bi- bia bib bic bie bif bih bii bik bis bka bkb bkc bke bkf bkk bks bsa bsb bsc bse bsf bsh bsi bsk bss c-- caa cab cac cae caf cah cai cak cas cba cbb cbc cbe cbf cbh cbi cbk cbs cca ccb ccc cce ccf cch cci cck ccs ce- cea ceb cec cee cef ceh cei cek ces cfa cfb cfc cfe cff cfh cfi cfk cfs ch- cha chb chc che chf chh chi chk chs ci- cia cib cic cie cif cih cii cik cis cka ckb ckc ckh cki cks csa csb csc cse csf csh csi csk css eaa eab eac eae eaf eah eai eak eas eba ebb ebc ebe ebf ebh ebi ebk ebs ec- eca ecb ecc ece ecf ech eci eck ecs eea eeb eec eee eef eek ees ef- efa efb efc efe eff efh efi efs eha ehb ehc ehe ehf ehh ehi ehs eia eib eic eie eif eii eik eis eka ekb ekc eke ekf ekh eki eks es- esa esb esc ese esf esh esi esk ess faa fab fac fae faf fah fai fak fas fba fbb fbc fbe fbf fbh fbi fbk fbs fca fcb fcc fce fcf fci fck fcs fea feb fec fee fef feh fei fek fes ffa ffc ffe fff ffh ffi ffk ffs fha fhb fhc fhe fhf fhh fhi fhs fia fib fic fie fif fih fii fik fis fka fkb fkc fkf fki fkk fsa fsb fsc fse fsf fsh fsi fsk fss h-i haa hab hac hae haf hah hai hak has hba hbb hbc hbe hbf hbh hbi hbk hbs hca hcb hcc hce hcf hch hci hck hcs he- hea heb hec hee hef heh hei hek hes hfa hfb hfc hfe hff hfh hfi hfk hfs hha hhb hhc hhe hhf hhh hhi hhk hhs hia hib hic hie hif hih hii hik his hka hkb hkf hkh hki hkk hks hsa hsb hsc hse hsf hsh hsi hsk hss i-f ia- iaa iab iac iae iaf iah iai ias iba ibb ibc ibe ibf ibh ibi ibk ibs ica icb icc ice icf ich ici ick ics ie- iea iec iee ief iei iek ies ifa ifb ifc ife iff ifi ifs iha ihb ihc ihe ihf ihh ihi ihk ihs iia iib iic iie iif iih iii iis ika ikb ikc ike ikf iki ikk iks is- isa isb isc ise isf ish isi isk iss ka- kaa kab kac kae kaf kah kai kak kas kba kbb kbc kbe kbf kbh kbi kbk kbs kca kcb kcc kce kch kci kck kcs ke- kea keb kec kee kef keh kei kek kes kfa kfc kff kfh kfi kfs kha khe khf khh khi khk khs kia kib kic kie kif kih kii kik kis kkb kkc kke kkh kki kkk kks ksa ksb ksc kse ksf ksh ksi ksk kss saa sab sac sae saf sah sai sak sas sba sbb sbc sbe sbf sbh sbi sbk sbs sca scb scc sce scf sch sci sck scs se- sea seb sec see sef seh sei sek ses sfa sfb sfc sfe sff sfh sfi sfk sfs sh- sha shb shc she shf shh shi shk shs sia sib sic sie sif sih sii sik sis sk- ska skb skc ske skf skh ski skk sks ss- ssa ssb ssc sse ssf ssh ssi ssk sss