-ic a-a a-b a-c a-i aaa aab aac aad aae aai aas ab- aba abb abc abd abe abi abs ac- aca acb acc acd ace aci acs ad- ada adb adc add ade adi ads aea aeb aec aed aee aei aes ai- aia aib aic aid aie aii ais as- asa asb asc asd ase asi ass baa bab bac bad bae bai bas bba bbb bbc bbd bbe bbi bbs bca bcb bcc bcd bce bci bcs bda bdb bdc bdd bde bdi bds be- bea beb bec bed bee bei bes bi- bia bib bic bid bie bii bis bsa bsb bsc bsd bse bsi bss c-- caa cab cac cad cae cai cas cba cbb cbc cbd cbe cbi cbs cca ccb ccc ccd cce cci ccs cda cdb cdc cdd cde cdi cds ce- cea ceb cec ced cee cei ces ci- cia cib cic cid cie cii cis csa csb csc csd cse csi css daa dab dac dad dae dai das dba dbb dbc dbd dbe dbi dbs dca dcb dcc dcd dce dci dcs dda ddb ddc ddd dde ddi dds de- dea deb dec ded dee dei des di- dia dib dic did die dii dis dsa dsb dsc dsd dse dsi dss eaa eab eac ead eae eai eas eba ebb ebc ebd ebe ebi ebs ec- eca ecb ecc ecd ece eci ecs ed- eda edb edc edd ede edi eds eea eeb eec eed eee ees eia eib eic eid eie eii eis es- esa esb esc esd ese esi ess i-d ia- iaa iab iac iad iae iai ias iba ibb ibc ibd ibe ibi ibs ica icb icc icd ice ici ics ida idb idc idd ide idi ids ie- iea iec ied iee iei ies iia iib iic iid iie iii iis is- isa isb isc isd ise isi iss saa sab sac sad sae sai sas sba sbb sbc sbd sbe sbi sbs sca scb scc scd sce sci scs sda sdb sdc sdd sde sdi sds se- sea seb sec sed see sei ses sia sib sic sid sie sii sis ss- ssa ssb ssc ssd sse ssi sss