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:
[49, -66]

Ex Output:
[-8.5]


Ex Input:
[-90, 40, 90]

Ex Output:
[-25.0, 65.0]


Ex Input:
[20, 33]

Ex Output:

[26.5]