def separate_words_and_numbers(strings):
    """
    Separates words and numbers into two lists.
    
    :param strings: List of strings.
    :return: One list of words and one list of numbers
    """
    filtered_words = []
    filtered_numbers = []
    for string in strings:
        if string.isdigit():
            filtered_numbers.append(string)
        else:
            filtered_words.append(string)
    return filtered_words, filtered_numbers