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:
[-22, -85]

Ex Output:
[-53.5]


Ex Input:
[38, 32, -3, 13, 55, 73]

Ex Output:
[35.0, 14.5, 5.0, 34.0, 64.0]


Ex Input:
[28, 15, -24, -42, 65, -7, 39]

Ex Output:

[21.5, -4.5, -33.0, 11.5, 29.0, 16.0]