def wordlists(*wl):
    """ Input is arbitrary number of lists of strings.
    Output is one dictionary where each string is a key
    and the count of those strings is the value """

    word_dict = {}
    for i in wl:
        for x in i:
            if x in word_dict:
                word_dict[x] += 1
            else:
                word_dict[x] = 1
    return word_dict