Get unique words (a.k.a. Remove the duplicates) getUniqueWords reads a file with given filepath and returns a list of all unique words that appeared in the file. For example, getUniqueWords ("input1.txt") returns either ["hello", "world"] or ["world", "hello"]; getUniqueWords ("input2.txt") returns either ["hello", "world"] or ["world", "hello"]. Hint: you need to call getCleanWordList first. def getUniqueWords (filepath, charsToRemove): Return a list of unique words that appeared in the file with the given filepath. return "stub" input1.txt hello hello hello world input2.txt hello world world world def getallwords (filepath): III Returns a list of all words from the given filepath. The function opens the file for reading, and closes the file before returning. result = [] f = open(filepath) for line in f: for word in line.strip ().split(): result.append(word) f.close() return result def getCleanWordList (filepath, charsToRemove): Read a file with given filepath, return a list of all words from the file with the specified characters that are stored in the string called charsToRemove are removed. Empty strings should not be added to the resulting list of cleaned words. words = getAllWords (filepath) for i in range (len (words)): words[i] = words [i].strip (charsToRemove) return words