(1) Hand code a decile frequency distribution from this data. Not that hard, but I blanked. I blame myself. I always use SQL's "NTILE()" , or histograms in R or MatPlotLib. Or better yet, "KDE".
(2) From 4x4 character matrix "A", Create a list of all words in dictionary "B". Each processing step must begin from a specific cell and branch in all 4 directions (up, down, left, right,.. like quarks) to build a string to test against the dictionary. Interesting.