def parse_schedule_with_breaks(schedule_data):
    """Parse schedule_data.

    Return list of tuples having delay in deparing to the first bus in list
    and bus number. Bus number represents as welll time between bus
    departures."""
    return [
        (delay_in_departing, int(bus))
        for delay_in_departing, bus in enumerate(schedule_data.split(','))
        if bus.isdigit()
    ]