(colorDisplay /@ (#//Characters)) & /@ g98toPower2Ofa    (* a - diagonal *)

( a   b   c   a   c   d   c   b   c   d   c   a   d   b   d   c   b   d   b   a   b    ...  b   c   b   a   c   b   c   d   c   a   c   d   c   b   d   c   d   a   d   b   d   c   b   c   a


Created by Mathematica  (November 1, 2003)