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:
[85, 64]

Ex Output:
[74.5]


Ex Input:
[-18, 63, 49, 17, 1]

Ex Output:
[22.5, 56.0, 33.0, 9.0]


Ex Input:
[49, 6, 22, -65, 70, 2, -91, -77, -33, 47, 8]

Ex Output:

[27.5, 14.0, -21.5, 2.5, 36.0, -44.5, -84.0, -55.0, 7.0, 27.5]