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:
[20, 17, 12, -4, 33, -71, 17, -43, 72, -53, 80]

Ex Output:
[18.5, 14.5, 4.0, 14.5, -19.0, -27.0, -13.0, 14.5, 9.5, 13.5]


Ex Input:
[-77, -23, -23, -16, 96, -98, 84, 76, -15, -46, -7]

Ex Output:
[-50.0, -23.0, -19.5, 40.0, -1.0, -7.0, 80.0, 30.5, -30.5, -26.5]


Ex Input:
[27, -84]

Ex Output:

[-28.5]