def main()

    # create an empty list named nums. woops :)
    nums = []

    # use a loop to add 20 random integers, all in the range from 1-100, to nums.
    # for this we will need a random g
    import random
    for i in range(20):
        nums.append(random.randint(1,100))

    # print the total of all list elements.
    print(nums)

    # print the highest number in the list.
    print(max(nums))

    # print the lowest number in the list.
    print(min(nums))

    # sort the list and then reverse it.
    nums.sort(reverse=True)

    # use another loop to display the sorted numbers in descending order,
    # all on the same line, separated by a single space.
    my_string = ""
    for number in nums:
        my_string = my_string + str(number) + " "
    # this part removes the extra space at the end
    my_string = my_string[0:-1]

    print(my_string)

    # determine if 75 is in the list. If it is, report the index of its first occurrence.
    # If it is absent from the list, indicate that, too.
    if 75 in nums:
        index_of_75 = nums.index(75)
    else:
        index_of_75 = "Not in list"
        print(index_of_75)

    # make a new list named middle_10 by slicing out the middle 10 elements of the descending list.
    # Use a loop to display the elements in middle_10 all on one line.
    middle_10 = nums[6-1:16-1]
    my_2nd_string = ""
    for number in middle_10:
        my_2nd_string = my_2nd_string + str(number) + " "
    # this part removes the extra space at the end
    my_2nd_string = my_2nd_string[0:-1]
    print(my_2nd_string)

    # make an empty list named evens and another empty list named odds.
    evens = []
    odds = []

    # use a loop to process nums,
    # adding even elements and odd elements to their respective lists.
    for number in nums:
        if number % 2 == 0:
            # number is even
            evens.append(number)
        else:
            # number is odd
            odds.append(number)

    # print both evens and odds. Crude dumps inside [ ] as shown next are okay.
    print("Evens: " + str(evens))
    print("Odds: " + str(odds))

main()