You have four tiles that say M, A, T, and H. How many words can you form from these tiles? For example, you can form 'AMH' and

Using casework, there are 4 + 6 + 18 + 24 = 52 possible words.

1 letter  + 2 letter    + 3 Letter  + 4 letter

    4             4 P 2        4 P 3       4 P 4

    4         +    12         +  24       +  24  = 64 words