a-a a-b aaa aab aad aae aag ab- aba abb abd abe abg ad- ada adb add ade adg aea aeb aed aee aeg ag- aga agb agd age agg baa bab bad bae bag bba bbb bbd bbe bbg bda bdb bdd bde bdg be- bea beb bed bee beg bga bgb bgd bge bgg daa dab dad dae dag dba dbb dbd dbe dbg dda ddb ddd dde ddg de- dea deb ded dee deg dga dgd dge dgg eaa eab ead eae eag eba ebb ebd ebe ebg ed- eda edb edd ede edg eea eeb eed eee eeg ega egb egd ege egg g-d gaa gab gad gae gag gba gbd gbe gbg gda gdb gdd gde ge- gea geb ged gee geg gga ggb ggd ggg