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:
[91, -52, -63, 41]

Ex Output:
[19.5, -57.5, -11.0]


Ex Input:
[38, -15, -76]

Ex Output:
[11.5, -45.5]


Ex Input:
[-6, -55, 2]

Ex Output:

[-30.5, -26.5]