You are given a String text. Concatenate all the elements to make one string. A pair of non-empty two non-overlapping substrings of equal length (A, B) is called k-similar if there are no more than k positions where A and B have different characters. Return the number of distinct strings that belong to at least one such pair.
|-||text will contain between 1 and 50 elements, inclusive.|
|-||Each element of text will contain between 1 and 50 characters, inclusive.|
|-||Each element of text will contain only lowercase letters ('a'..'z').|
|-||k will be between 0 and 2500, inclusive.|