def get_mp_numbers(mp_filename):
    """
    The file should contains the lines like below

    mp-10009
    mp-1000
    mp-10070
    mp-10074
    mp-10080
    mp-10096
    mp-10103
    ...
    """

    with open(mp_filename) as f:
        numbers = [int(line.replace("mp-", "")) for line in f]
    numbers.sort()
    return numbers