a-a a-b aaa aab aad aag aah aau ab- aba abb abd abg abh abu ad- ada adb add adg adh adu ag- aga agb agd agg agh agu aha ahb ahd ahg ahh ahu au- aua aub aud aug auh b-u baa bab bad bag bah bau bba bbb bbd bbg bbh bbu bda bdb bdd bdg bdh bdu bga bgb bgd bgg bgh bgu bha bhb bhd bhg bhh bhu bua bub bud bug buh buu daa dab dad dag dah dau dba dbb dbd dbg dbh dbu dda ddb ddd ddg ddh ddu dga dgd dgg dgh dgu dh- dha dhb dhd dhh dhu dua dub dud dug duh g-d gaa gab gad gag gah gau gba gbd gbg gbh gbu gda gdb gdd gdh gdu gga ggb ggd ggg ggh ggu gha ghb ghd ghg ghh gu- gua gub gud gug guu haa hab had hag hah hau hba hbb hbd hbg hbh hbu hda hdb hdd hdg hdh hdu hga hgb hgg hgh hgu hha hhb hhd hhg hhh hhu hua hub hud hug huh huu ua- uaa uab uad uag uah uau uba ubb ubg ubh ubu uda udb udd udg udu uga ugb ugg ugh ugu uha uhb uhd uhh uhu uua uug uuu