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:
[27, 32, -92]

Ex Output:
[29.5, -30.0]


Ex Input:
[-19, -14, -45, -75, 0]

Ex Output:
[-16.5, -29.5, -60.0, -37.5]


Ex Input:
[-28, -13, -18]

Ex Output:

[-20.5, -15.5]