def format_chunks(size, string):
    """
    Splits a string into chunks of [size] characters, for easy human readability
    """
    tail = ""
    remainder = len(string) % size
    arr = [string[size * i: size * i + size] for i in range(len(string) / size)]
    body = " ".join(arr)
    if remainder > 0:
        tail = string[-remainder:]
    return body + " " + tail