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:
[83, 68, 64, 59]

Ex Output:
[75.5, 66.0, 61.5]


Ex Input:
[96, 76, -4]

Ex Output:
[86.0, 36.0]


Ex Input:
[-46, 55, -87, -18, 73, 42, -19, 16, 18]

Ex Output:

[4.5, -16.0, -52.5, 27.5, 57.5, 11.5, -1.5, 17.0]