class Autocomplete:

    def __init__(self, *arg):
        self.dict = {}
        self.arg = arg

        for i in arg:
            self.add(i)

    def add(self, word):
        if word[0] in self.dict:
            self.dict[word[0]].append(word)
            return self
        else:
            self.dict[word[0]] = [word]
            return self

    def extend(self,lijst):
        for i in lijst:
            self.add(i)