Statement

Luca heard from George about the powers of the Kabbalah and now he wants to try for himself. He promptly enrolled in the same course as George, where students routinely spend days and nights studing the wisdoms hidden in the Bible. Luca learned that in order to become the master of all masters it is crucial to list all the numbers contained in all pages of the Bible, and put those numbers in a N × M grid. Doing so will make the numbers entagle together and release the hidden power! After preparing the matrix, Luca needs to find a clue: the year of the edition of the master book, a particular Bible which is thought to be the most powerful one. The year is defined as the 4-digit number (without leading zeros) that appears most frequently in the grid. When looking for these occurrences, all sequences of 4 adjacent positions in the 8 cardinal directions are considered (see examples).