Given the two lists:
listOne = [3, 6, 9, 12, 15, 18, 21]
listTwo = [1, 4, 7, 10, 13, 16, 19]
Create a third list called listThree by adding all odd-index
elements from the first list and all even index elements from
the second list. Print out your answer.
Your code should print out:
The third list is: [3, 9, 15, 21, 4, 10, 16]