a-a a-b a-i aaa aab aad aag aai aao ab- aba abb abd abg abi abo ad- ada adb add adg adi ado ag- aga agb agd agg agi ago ai- aia aib aid aig aii aio aoa aob aod aog aoi aoo baa bab bad bag bai bao bba bbb bbd bbg bbi bbo bda bdb bdd bdg bdi bdo bga bgb bgd bgg bgi bgo bi- bia bib bid big bii bio boa bob bod bog boi boo daa dab dad dag dai dao dba dbb dbd dbg dbi dbo dda ddb ddd ddg ddi ddo dga dgd dgg dgi di- dia dib did dig dii dio doa dob dod dog doi doo g-d gaa gab gad gag gai gao gba gbd gbg gbi gbo gda gdb gdd gdi gdo gga ggb ggd ggg ggi ggo gia gib gid gig gii gio goa gob god gog goi goo i-d ia- iaa iab iad iag iai iao iba ibb ibd ibg ibi ibo ida idb idd idg idi ido iga igb igd igg igi igo iia iib iid iii iio io- ioa iob iod iog ioi ioo o-i oaa oab oad oag oai oao ob- oba obb obd obg obi obo oda odb odd odg odi odo oga ogd ogg ogi ogo oia oib oid oii oio oo- ooa oob ood oog ooi ooo