Teacher: In this task you are given a list of integers and you need to find the absolute value of the difference between each two consecutive values. The output should be a list of the absolute value of the differences of each two consecutive values.
Teacher: Now, understand the problem? If you are still confused, see the following example:
[7, 1, 5, 8, -4]
Solution: [6, 4, 3, 12]
Reason: The output is a list of the absolute value of the differences of every two consecutive values. So this is a good example.

Now, solve this instance: [28, 69]
Student:
[41]