Hi Harry, after doing this you get the factors [1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 650, 1625, 3250].
This would suggest each induvial boxes size, but I tried all the box sizes for cribs like ‘Jodie’ but none of them seem to make ‘Jodie’ and have sensible English with the spare letters (A few make Jodie). I tried scrambling each matrix with double transpositions, columnar transpositions, and by transposing each box but now luck. Am I missing something or have I gone down the wrong rabbit hole? I appreciate that perhaps this isn’t the time to be asking for further support, so if so please feel free to ignore this message.