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:
[64, -5, -29]

Ex Output:
[29.5, -17.0]


Ex Input:
[40, 34, -39]

Ex Output:
[37.0, -2.5]


Ex Input:
[-18, 51, 50, -80, -81, 4, -40, -94, -46, -7]

Ex Output:

[16.5, 50.5, -15.0, -80.5, -38.5, -18.0, -67.0, -70.0, -26.5]