You are given a list of words, each with a 3 letter animal prefix. The rest of the word is the suffix. Process all of the words, adding each new prefix to a dictionary with a list of all suffixes found for that prefix.

You can check if a key is already in a dict using the same 'value in list' style syntax: 'key in dict' (without quotes)

WARNING Codingbat has issues with formatting so you have to return a list with your dictionary inside of it. You must return [D] where D is your dictionary.