In this task you are given a list of numbers and you need to find the average of each two consecutive values. The average of two numbers a and b is calculated as: (a + b) /2. The output should be a list of the averages of each two consecutive values. A list is presented with two brackets and comma-separated values, like: [1,2,3].

Example Input: [81, 73]
Example Output: [77.0]

Example Input: [-41, -35]
Example Output: [-38.0]

Example Input: [-8, 58, -80, -85, -31, -28, 49, 20]
Example Output:
[25.0, -11.0, -82.5, -58.0, -29.5, 10.5, 34.5]