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:
[57, 81, -99]

Ex Output:
[69.0, -9.0]


Ex Input:
[-80, -95, 61, -96, 44, 18, 84, -7]

Ex Output:
[-87.5, -17.0, -17.5, -26.0, 31.0, 51.0, 38.5]


Ex Input:
[-4, -73, -88, 98, 21, -27, 64, 17, 20, -82, -52, -46, 24, -69, -3]

Ex Output:

[-38.5, -80.5, 5.0, 59.5, -3.0, 18.5, 40.5, 18.5, -31.0, -67.0, -49.0, -11.0, -22.5, -36.0]