def right_window_coords(win_size, original_right_bound):
    """
    Returns a `tuple` `(new_start, new_end)` right of original bound describing a window of length `win_size`.

    :param win_size: size of window to the right.
    :param original_right_bound:
    :return: new_coords
    """
    new_start = original_right_bound + 1
    new_end = original_right_bound + win_size

    new_coords = (new_start, new_end)

    return new_coords