a-a a-b aaa aab aad aae aag aan aao aas ab- aba abb abd abe abg abn abo abs ad- ada adb add ade adg adn ado ads aea aeb aed aee aeg aen aeo aes ag- aga agb agd age agg agn ago ags an- ana anb and ane ang ann ano ans aoa aob aod aoe aog aon aoo aos as- asa asb asd ase asg asn aso ass baa bab bad bae bag ban bao bas bba bbb bbd bbe bbg bbn bbo bbs bda bdb bdd bde bdg bdo bds be- bea beb bed bee beg ben beo bes bga bgb bgd bge bgg bgn bgo bgs bna bnb bnd bne bng bnn bno bns boa bob bod boe bog bon boo bos bsa bsb bsd bse bsg bsn bso bss daa dab dad dae dag dan dao das dba dbb dbd dbe dbg dbn dbo dbs dda ddb ddd dde ddg ddn ddo dds de- dea deb ded dee deg den deo des dga dgd dge dgg dgn dgs dna dnb dnd dne dng dnn dno dns doa dob dod doe dog don doo dos dsa dsb dsd dse dsg dsn dso dss eaa eab ead eae eag ean eao eas eba ebb ebd ebe ebg ebn ebo ebs ed- eda edb edd ede edg edn edo eds eea eeb eed eee eeg een eeo ees ega egb egd ege egg egn ego egs en- ena enb end ene eng enn eno ens eo- eoa eob eod eoe eog eon eoo eos es- esa esb esd ese esg esn eso ess g-d gaa gab gad gae gag gan gao gas gba gbd gbe gbg gbn gbo gbs gda gdb gdd gde gdn gdo gds ge- gea geb ged gee geg gen geo ges gga ggb ggd ggg ggn ggo ggs gna gnb gnd gne gnn gno gns goa gob god goe gog gon goo gos gsa gsb gsd gse gsg gsn gso gss naa nab nad nae nag nan nao nas nba nbb nbd nbe nbg nbn nbo nbs nda ndb ndd nde ndg ndn ndo nds ne- nea neb ned nee neg nen neo nes nga ngb ngd nge ngg ngn ngo ngs nna nnb nne nng nnn nno nns no- noa nob nod noe nog non noo nos nsa nsb nsd nse nsg nsn nso nss oaa oab oad oae oag oan oao oas ob- oba obb obd obe obg obn obo obs oda odb odd ode odg odn odo ods oea oeb oed oee oeg oen oeo oes oga ogd oge ogg ogn ogo ogs on- ona onb ond one ong onn ono ons oo- ooa oob ood oog oon ooo oos os- osa osb osd ose osg osn oso oss saa sab sad sae sag san sao sas sba sbb sbd sbe sbg sbn sbo sbs sda sdb sdd sde sdg sdn sdo sds se- sea seb sed see seg sen seo ses sga sgb sgd sge sgg sgn sgo sgs sna snb snd sne sng snn sno sns soa sob sod soe sog son soo sos ss- ssa ssb ssd sse ssg ssn sso sss