-ic a-a a-b a-c a-i aaa aab aac aae aah aai aan aas ab- aba abb abc abe abh abi abn abs ac- aca acb acc ace ach aci acn acs aea aeb aec aee aeh aei aen aes aha ahb ahc ahe ahh ahi ahn ahs ai- aia aib aic aie aih aii ain ais an- ana anb anc ane anh ani ann ans as- asa asb asc ase ash asi asn ass baa bab bac bae bah bai ban bas bba bbb bbc bbe bbh bbi bbn bbs bca bcb bcc bce bch bci bcn bcs be- bea beb bec bee beh bei ben bes bha bhb bhc bhe bhh bhi bhs bi- bia bib bic bie bih bii bin bis bna bnb bnc bne bni bnn bns bsa bsb bsc bse bsh bsi bsn bss c-- caa cab cac cae cah cai can cas cba cbb cbc cbe cbh cbi cbn cbs cca ccb ccc cce cch cci ccn ccs ce- cea ceb cec cee ceh cei cen ces ch- cha chb chc che chh chi chn chs ci- cia cib cic cie cih cii cin cis cn- cna cnb cnc cne cnh cni cnn cns csa csb csc cse csh csi csn css eaa eab eac eae eah eai ean eas eba ebb ebc ebe ebh ebi ebn ebs ec- eca ecb ecc ece ech eci ecn ecs eea eeb eec eee een ees eha ehb ehc ehe ehh ehi ehn ehs eia eib eic eie eii ein eis en- ena enb enc ene enh eni enn ens es- esa esb esc ese esh esi esn ess h-i haa hab hac hae hah hai han has hba hbb hbc hbe hbh hbi hbn hbs hca hcb hcc hce hch hci hcn hcs he- hea heb hec hee heh hei hen hes hha hhb hhc hhe hhh hhi hhn hhs hia hib hic hie hih hii hin his hna hnb hnc hne hnh hnn hns hsa hsb hsc hse hsh hsi hsn hss ia- iaa iab iac iae iah iai ian ias iba ibb ibc ibe ibh ibi ibn ibs ica icb icc ice ich ici icn ics ie- iea iec iee iei ien ies iha ihb ihc ihe ihh ihi ihn ihs iia iib iic iie iih iii iin iis in- ina inb inc ine inh ini inn ins is- isa isb isc ise ish isi isn iss n-i naa nab nac nae nah nai nan nas nba nbb nbc nbe nbi nbn nbs nca ncb ncc nce nch nci ncn ncs ne- nea neb nec nee neh nei nen nes nha nhb nhc nhe nhh nhi nhn nhs nia nib nic nie nih nii nin nis nna nnb nnc nne nnh nni nnn nns nsa nsb nsc nse nsh nsi nsn nss saa sab sac sae sah sai san sas sba sbb sbc sbe sbh sbi sbn sbs sca scb scc sce sch sci scn scs se- sea seb sec see seh sei sen ses sh- sha shb shc she shh shi shn shs sia sib sic sie sih sii sin sis sna snb snc sne sni snn sns ss- ssa ssb ssc sse ssh ssi ssn sss