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:
[54, 51, -18]

Ex Output:
[52.5, 16.5]


Ex Input:
[53, -70, 12, 14, -11, -69, 85]

Ex Output:
[-8.5, -29.0, 13.0, 1.5, -40.0, 8.0]


Ex Input:
[15, 12, -34, 98, 51, -24, -65]

Ex Output:

[13.5, -11.0, 32.0, 74.5, 13.5, -44.5]