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:
[97, -97, 10]

Ex Output:
[0.0, -43.5]


Ex Input:
[91, 3, -59, 63]

Ex Output:
[47.0, -28.0, 2.0]


Ex Input:
[29, 48, -25, 40, 66, -16, -22, 11, -29, 44, -66, 70, -43]

Ex Output:

[38.5, 11.5, 7.5, 53.0, 25.0, -19.0, -5.5, -9.0, 7.5, -11.0, 2.0, 13.5]