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:
[-14, 33, -89]

Ex Output:
[9.5, -28.0]


Ex Input:
[38, 32, -3, 13, 55, 73]

Ex Output:
[35.0, 14.5, 5.0, 34.0, 64.0]


Ex Input:
[-55, 31, -38, -42, 2, 100, 55, -78, -21, 21, 81, 32]

Ex Output:

[-12.0, -3.5, -40.0, -20.0, 51.0, 77.5, -11.5, -49.5, 0.0, 51.0, 56.5]