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:
[-12, -89]

Ex Output:
[-50.5]


Ex Input:
[6, -20, 92, 43, -89, 46, 1, -64, -71, 88]

Ex Output:
[-7.0, 36.0, 67.5, -23.0, -21.5, 23.5, -31.5, -67.5, 8.5]


Ex Input:
[18, 46, -89, -30, 24, 60, 15, 77, 49, 27, 92, 37, -19]

Ex Output:

[32.0, -21.5, -59.5, -3.0, 42.0, 37.5, 46.0, 63.0, 38.0, 59.5, 64.5, 9.0]