def three_measurement_window_sum(list_int):
    """
    This function calculates the sums of all three-measurement sliding windows in the list.
    This is part of the answer to the second puzzle.

    Parameters:
        list_int (list): list of measurements(integers)

    Returns:
        new_list (list): list of sums of all three-measurement sliding windows (integers).
    """

    new_list = []
    for i in range(len(list_int) - 2):
        window_value = list_int[i] + list_int[i + 1] + list_int[i + 2]
        new_list.append(window_value)
    return new_list