Medium — Challenge 1

Welcome to the Intermediate level of Decipher Academy! Substitution ciphers don’t always use alphabets in the traditional sense. The polybius square, as its name suggests, puts an alphabet on a grid, and letters correspond to coordinates on the grid. The grid can only have 25 letters Normally, the grid is determined by the creator, but let’s practice with the the most common grid: Decode the following: 3423333424231151153334433511131543