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:
[-39, 16, -88, -73, 52, -75, -23, -37, 21]

Ex Output:
[-11.5, -36.0, -80.5, -10.5, -11.5, -49.0, -30.0, -8.0]


Ex Input:
[-33, -1, -94, -98, -30, 45, -46]

Ex Output:
[-17.0, -47.5, -96.0, -64.0, 7.5, -0.5]


Ex Input:
[71, -17, 23, 62]

Ex Output:

[27.0, 3.0, 42.5]