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:
[-31, 21, -23]

Ex Output:
[-5.0, -1.0]


Ex Input:
[63, 44, -32, 39, -3, 79, 76, -74, 57, -73, -42]

Ex Output:
[53.5, 6.0, 3.5, 18.0, 38.0, 77.5, 1.0, -8.5, -8.0, -57.5]


Ex Input:
[5, 67, 37, -22, 33, 30, -40, -32, -56, 89, 52]

Ex Output:

[36.0, 52.0, 7.5, 5.5, 31.5, -5.0, -36.0, -44.0, 16.5, 70.5]