a-a a-b aaa aab aad aag aan aas ab- aba abb abd abg abn abs ad- ada adb add adg adn ads ag- aga agb agd agg agn ags an- ana anb and ang ann ans as- asa asb asd asg asn ass baa bab bad bag ban bas bba bbb bbd bbg bbn bbs bda bdb bdd bdg bds bga bgb bgd bgg bgn bgs bna bnb bnd bng bnn bns bsa bsb bsd bsg bsn bss daa dab dad dag dan das dba dbb dbd dbg dbn dbs dda ddb ddd ddg ddn dds dga dgd dgg dgn dgs dna dnb dnd dng dnn dns dsa dsb dsd dsg dsn dss g-d gaa gab gad gag gan gas gba gbd gbg gbn gbs gda gdb gdd gdn gds gga ggb ggd ggg ggn ggs gna gnb gnd gnn gns gsa gsb gsd gsg gsn gss naa nab nad nag nan nas nba nbb nbd nbg nbn nbs nda ndb ndd ndg ndn nds nga ngb ngd ngg ngn ngs nna nnb nng nnn nns nsa nsb nsd nsg nsn nss saa sab sad sag san sas sba sbb sbd sbg sbn sbs sda sdb sdd sdg sdn sds sga sgb sgd sgg sgn sgs sna snb snd sng snn sns ss- ssa ssb ssd ssg ssn sss