英语翻译Problem DescriptionIn order to make a new word,we will p

英语翻译
Problem Description
In order to make a new word,we will pick out m letters from all the upper case letters and lower case letters(from `a' to `Z').Therefore,that means you can pick some same letters.But here are two rules:
● as to all the neighbour letters,the absolute value of their ASCII code must be not greater than 32.
● there must be at least one pair of neighbour letters whose absolute value of ASCII code is exactly equal to 32.For example,considering the word in the form like "Xx" or "xX",the neighbour letters have an absolute value of ASCII code exactly equal to 32.
Now how many di erent words can we get?