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:
[-31, 39, -47]

Ex Output:
[4.0, -4.0]


Ex Input:
[-25, 42, -59, 3, 93]

Ex Output:
[8.5, -8.5, -28.0, 48.0]


Ex Input:
[20, 26, 84, 61, 64, -17, -4, 24, -78, -1, -81]

Ex Output:

[23.0, 55.0, 72.5, 62.5, 23.5, -10.5, 10.0, -27.0, -39.5, -41.0]