Instructions

An anagram is a rearrangement of letters to form a new word. Given a word and a list of candidates, select the sublist of anagrams of the given word.

Given "listen" and a list of candidates like "enlists" "google" "inlets" "banana" the program should return a list containing "inlets".

To complete this exercise you need to implement the function anagramsFor, that takes a word and a group of words, returning the ones that are anagrams of the given word.

If it is your first time solving this exercise, it is recommended that you stick to the provided signature:

anagramsFor :: String -> [String] -> [String]

Later, it may be a good idea to revisit this problem and play with other data types and libraries:

Text, from package text.
Sequence and Set, from package containers.
MultiSet, from package multiset

The test suite was intentionally designed to accept almost any type signature that makes sense, so you are encouraged to find the one you think is the best.