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:
[-47, 99, -39, 1, 32, 77, 4, 53, -71]

Ex Output:
[26.0, 30.0, -19.0, 16.5, 54.5, 40.5, 28.5, -9.0]


Ex Input:
[-38, 16, 22, 72, 38, -22, 16, -14, 8, -69, 52, -91, -96, 70]

Ex Output:
[-11.0, 19.0, 47.0, 55.0, 8.0, -3.0, 1.0, -3.0, -30.5, -8.5, -19.5, -93.5, -13.0]


Ex Input:
[7, -23]

Ex Output:

[-8.0]