-ic a-a a-b a-c a-i aaa aab aac aad aae aai aao aas ab- aba abb abc abd abe abi abo abs ac- aca acb acc acd ace aci aco acs ad- ada adb adc add ade adi ado ads aea aeb aec aed aee aei aeo aes ai- aia aib aic aid aie aii aio ais aoa aob aoc aod aoe aoi aoo aos as- asa asb asc asd ase asi aso ass baa bab bac bad bae bai bao bas bba bbb bbc bbd bbe bbi bbo bbs bca bcb bcc bcd bce bci bco bcs bda bdb bdc bdd bde bdi bdo bds be- bea beb bec bed bee bei beo bes bi- bia bib bic bid bie bii bio bis boa bob boc bod boe boi boo bos bsa bsb bsc bsd bse bsi bso bss c-- caa cab cac cad cae cai cao cas cba cbb cbc cbd cbe cbi cbo cbs cca ccb ccc ccd cce cci cco ccs cda cdb cdc cdd cde cdi cdo cds ce- cea ceb cec ced cee cei ceo ces ci- cia cib cic cid cie cii cio cis co- coa cob coc cod coe coi coo cos csa csb csc csd cse csi cso css daa dab dac dad dae dai dao das dba dbb dbc dbd dbe dbi dbo dbs dca dcb dcc dcd dce dci dco dcs dda ddb ddc ddd dde ddi ddo dds de- dea deb dec ded dee dei deo des di- dia dib dic did die dii dio dis doa dob doc dod doe doi doo dos dsa dsb dsc dsd dse dsi dso dss eaa eab eac ead eae eai eao eas eba ebb ebc ebd ebe ebi ebo ebs ec- eca ecb ecc ecd ece eci eco ecs ed- eda edb edc edd ede edi edo eds eea eeb eec eed eee eeo ees eia eib eic eid eie eii eio eis eo- eoa eob eoc eod eoe eoi eoo eos es- esa esb esc esd ese esi eso ess i-d ia- iaa iab iac iad iae iai iao ias iba ibb ibc ibd ibe ibi ibo ibs ica icb icc icd ice ici ico ics ida idb idc idd ide idi ido ids ie- iea iec ied iee iei ies iia iib iic iid iie iii iio iis io- ioa iob ioc iod ioe ioi ioo ios is- isa isb isc isd ise isi iso iss o-i oaa oab oac oad oae oai oao oas ob- oba obb obc obd obe obi obo obs oc- oca ocb occ ocd oci oco ocs oda odb odc odd ode odi odo ods oea oeb oec oed oee oei oeo oes oia oib oic oid oie oii oio ois oo- ooa oob ooc ood ooi ooo oos os- osa osb osc osd ose osi oso oss saa sab sac sad sae sai sao sas sba sbb sbc sbd sbe sbi sbo sbs sca scb scc scd sce sci sco scs sda sdb sdc sdd sde sdi sdo sds se- sea seb sec sed see sei seo ses sia sib sic sid sie sii sio sis soa sob soc sod soe soi soo sos ss- ssa ssb ssc ssd sse ssi sso sss