a-a a-b aaa aab aad aag aah aan ab- aba abb abd abg abh abn ad- ada adb add adg adh adn ag- aga agb agd agg agh agn aha ahb ahd ahg ahh ahn an- ana anb and ang anh ann baa bab bad bag bah ban bba bbb bbd bbg bbh bbn bda bdb bdd bdg bdh bga bgb bgd bgg bgh bgn bha bhb bhd bhg bhh bna bnb bnd bng bnn daa dab dad dag dah dan dba dbb dbd dbg dbh dbn dda ddb ddd ddg ddh ddn dga dgd dgg dgh dgn dh- dha dhb dhd dhh dna dnb dnd dng dnh dnn g-d gaa gab gad gag gah gan gba gbd gbg gbh gbn gda gdb gdd gdh gdn gga ggb ggd ggg ggh ggn gha ghb ghd ghg ghh ghn gna gnb gnd gnn haa hab had hag hah han hba hbb hbd hbg hbh hbn hda hdb hdd hdg hdh hdn hga hgb hgg hgh hgn hha hhb hhd hhg hhh hhn hna hnb hnd hng hnh hnn naa nab nad nag nah nan nba nbb nbd nbg nbn nda ndb ndd ndg ndh ndn nga ngb ngd ngg ngh ngn nha nhb nhd nhg nhh nhn nna nnb nng nnh nnn