in reply to printing upper letter of the matrix
If your numerical data may now contain up to four digits (i.e. 2 digits more than previously), how is it possible that you cannot modify the format to accommodate this?
I suggest you go back to my previous reply and read the documentation regarding formats that I linked to. If, after that, you still can't work it out, please post again specifying exactly the difficulty you're having adding 2 to a number.