Reverse

Pass in the string, return the character that is most common and the number of times it occurred. Count the upper-case and lower-case version of a letter as the same letter. Hint: count how many times the first letter in the string occurs. Then check how many times the second letter in the string occurs, etc. It is legal in Python to return ... ................
................

In order to avoid copyright disputes, this page is only a partial summary.