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, -42, -14, -48, -62, 7, -9]

Ex Output:
[7.5, -28.0, -31.0, -55.0, -27.5, -1.0]


Ex Input:
[83, -58]

Ex Output:
[12.5]


Ex Input:
[-89, 92, -49, -36, -1, 4, 15, -76, 75, -7, -81, -51, 53, -25]

Ex Output:

[1.5, 21.5, -42.5, -18.5, 1.5, 9.5, -30.5, -0.5, 34.0, -44.0, -66.0, 1.0, 14.0]