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:
[25, 11, -70, 49, 17, 25, -51, -78, -13, -69, -55, 83, -8]

Ex Output:
[18.0, -29.5, -10.5, 33.0, 21.0, -13.0, -64.5, -45.5, -41.0, -62.0, 14.0, 37.5]


Ex Input:
[-16, 50]

Ex Output:

[17.0]