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:
[-72, 43, 78, -30, 53]

Ex Output:
[-14.5, 60.5, 24.0, 11.5]


Ex Input:
[84, -86, 12, 56, 39, 30]

Ex Output:
[-1.0, -37.0, 34.0, 47.5, 34.5]


Ex Input:
[6, 15, -58]

Ex Output:

[10.5, -21.5]