def parse_one_line(line):
    """ Get one line of a file in this format
        16:17:266:2864    3:4:194:2443

    and return a couple of lists

        [16,17,266,2864], [3,4,194,2443]
    """
    line_trial, line_success = line.split('    ')
    one_trial = [int(s) for s in line_trial.split(':')]
    one_success = [int(s) for s in line_success.split(':')]
    return one_trial, one_success