3389. Minimum Operations to Make Character Frequencies Equal

You are given a string s. A string t is called good if all characters of t occur the same number of times. You can perform the following operations any number of times: - Delete a character from s. - Insert a character in s. - Change a character in s to its next letter in the alphabet. Note that you cannot change 'z' to 'a' using the third operation. Return the minimum number of operations