Now have a solution that works with 6,6 but no spaces between letters. The blanks would probably best fit at each end to fill the remaining 2 squares. Does not feel as elegant as others describe.
Also worried about A which indicates introducing a specific number of objects. I have one at the intersection, 4 with the two pairs of initials and possibly one in the title. So not enough.
Could these objects be added between cells as letter dividers for the coded row?
So near yet so far. Frustrating.