a-a a-b aaa aab aad aae aag aao aas ab- aba abb abd abe abg abo abs ad- ada adb add ade adg ado ads aea aeb aed aee aeg aeo aes ag- aga agb agd age agg ago ags aoa aob aod aoe aog aoo aos as- asa asb asd ase asg aso ass baa bab bad bae bag bao bas bba bbb bbd bbe bbg bbo bbs bda bdb bdd bde bdg bdo bds be- bea beb bed bee beg beo bes bga bgb bgd bge bgg bgo bgs boa bob bod boe bog boo bos bsa bsb bsd bse bsg bso bss daa dab dad dae dag dao das dba dbb dbd dbe dbg dbo dbs dda ddb ddd dde ddg ddo dds de- dea deb ded dee deg deo des dga dgd dge dgg dgs doa dob dod doe dog doo dos dsa dsb dsd dse dsg dso dss eaa eab ead eae eag eao eas eba ebb ebd ebe ebg ebo ebs ed- eda edb edd ede edg edo eds eea eeb eed eee eeg eeo ees ega egb egd ege egg ego egs eo- eoa eob eod eoe eog eoo eos es- esa esb esd ese esg eso ess g-d gaa gab gad gae gag gao gas gba gbd gbe gbg gbo gbs gda gdb gdd gde gdo gds ge- gea geb ged gee geg geo ges gga ggb ggd ggg ggo ggs goa gob god goe gog goo gos gsa gsb gsd gse gsg gso gss oaa oab oad oae oag oao oas ob- oba obb obd obe obg obo obs oda odb odd ode odg odo ods oea oeb oed oee oeg oeo oes oga ogd oge ogg ogo ogs oo- ooa oob ood oog ooo oos os- osa osb osd ose osg oso oss saa sab sad sae sag sao sas sba sbb sbd sbe sbg sbo sbs sda sdb sdd sde sdg sdo sds se- sea seb sed see seg seo ses sga sgb sgd sge sgg sgo sgs soa sob sod soe sog soo sos ss- ssa ssb ssd sse ssg sso sss