Create a function that returns the number of hashes and pluses in a string.
HashPlusCount("###+") ➞ [3, 1]
HashPlusCount("##+++#") ➞ [3, 3]
HashPlusCount("#+++#+#++#") ➞ [4, 6]
HashPlusCount("") ➞ [0, 0][0, 0] for an empty string.[hashes, pluses].