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:
[20, -17, 41, -60, 2, 64, 36, 16, -43]

Ex Output:
[1.5, 12.0, -9.5, -29.0, 33.0, 50.0, 26.0, -13.5]


Ex Input:
[40, 34, -39]

Ex Output:
[37.0, -2.5]


Ex Input:
[-53, 64, 68, 21, 65, -92, 5]

Ex Output:

[5.5, 66.0, 44.5, 43.0, -13.5, -43.5]