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, 57, 16, -66, -30, -89, 64, -22, 7, -36, -19, -71]

Ex Output:
[38.5, 36.5, -25.0, -48.0, -59.5, -12.5, 21.0, -7.5, -14.5, -27.5, -45.0]


Ex Input:
[74, -35, -92, -40, 97]

Ex Output:
[19.5, -63.5, -66.0, 28.5]


Ex Input:
[26, 82]

Ex Output:

[54.0]