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, 59, -52, 34, 5, 83, 49, -1, 27]

Ex Output:
[-16.0, 3.5, -9.0, 19.5, 44.0, 66.0, 24.0, 13.0]


Ex Input:
[-45, 34]

Ex Output:
[-5.5]


Ex Input:
[-55, 15, 73, 18, -81, -28]

Ex Output:

[-20.0, 44.0, 45.5, -31.5, -54.5]