You will be given a definition of a task first, then some input of the task.
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].

[-42, 87, 58, -15, 13, -57, -41, 89, 84, -78, -81, 22]
Output:
[22.5, 72.5, 21.5, -1.0, -22.0, -49.0, 24.0, 86.5, 3.0, -79.5, -29.5]