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:
[87, 0, -6, 78, 26]

Ex Output:
[43.5, -3.0, 36.0, 52.0]


Ex Input:
[68, -66]

Ex Output:
[1.0]


Ex Input:
[-13, 16, -24, -7, 99, 19, 1, 46, -1, 74, -34, -1]

Ex Output:

[1.5, -4.0, -15.5, 46.0, 59.0, 10.0, 23.5, 22.5, 36.5, 20.0, -17.5]