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:
[57, 81, -99]

Ex Output:
[69.0, -9.0]


Ex Input:
[58, 51, 76, 8, 35, 37, 94, -73]

Ex Output:
[54.5, 63.5, 42.0, 21.5, 36.0, 65.5, 10.5]


Ex Input:
[16, 1, -7, -42, 1, 59]

Ex Output:

[8.5, -3.0, -24.5, -20.5, 30.0]