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].

Ex Input:
[-81, 99, -79, 70, 91]

Ex Output:
[9.0, 10.0, -4.5, 80.5]


Ex Input:
[-10, 80, -47, 88, 17, 70, -21, 5]

Ex Output:
[35.0, 16.5, 20.5, 52.5, 43.5, 24.5, -8.0]


Ex Input:
[19, -70, 8, 39]

Ex Output:

[-25.5, -31.0, 23.5]