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:
[30, -51, 47]

Ex Output:
[-10.5, -2.0]


Ex Input:
[-53, 31, 52]

Ex Output:
[-11.0, 41.5]


Ex Input:
[45, -15, -51, 87, -33, -35, -84, -33]

Ex Output:

[15.0, -33.0, 18.0, 27.0, -34.0, -59.5, -58.5]