a-a a-b a-i aaa aab aad aag aai ab- aba abb abd abg abi ad- ada adb add adg adi ag- aga agb agd agg agi ai- aia aib aid aig aii baa bab bad bag bai bba bbb bbd bbg bbi bda bdb bdd bdg bdi bga bgb bgd bgg bgi bi- bia bib bid big bii daa dab dad dag dai dba dbb dbd dbg dbi dda ddb ddd ddg ddi dga dgd dgg dgi di- dia dib did dig dii g-d gaa gab gad gag gai gba gbd gbg gbi gda gdb gdd gdi gga ggb ggd ggg ggi gia gib gid gig gii i-d ia- iaa iab iad iag iai iba ibb ibd ibg ibi ida idb idd idg idi iga igb igd igg igi iia iib iid iii