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:
[58, -15]

Ex Output:
[21.5]


Ex Input:
[81, 73]

Ex Output:
[77.0]


Ex Input:
[-92, -22, 64, 67]

Ex Output:

[-57.0, 21.0, 65.5]