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, -27, -20, 4, -82, 58, -39, 92, 64, -68, -21]

Ex Output:
[-42.0, -23.5, -8.0, -39.0, -12.0, 9.5, 26.5, 78.0, -2.0, -44.5]


Ex Input:
[96, -100, -60, -70, 33, -23, 42, 80, 33, -32, -52, -14, -62, 11]

Ex Output:
[-2.0, -80.0, -65.0, -18.5, 5.0, 9.5, 61.0, 56.5, 0.5, -42.0, -33.0, -38.0, -25.5]


Ex Input:
[50, 43, -6, -30, 66, -2, -90, -7, 32, -65, -88, -43, 11]

Ex Output:

[46.5, 18.5, -18.0, 18.0, 32.0, -46.0, -48.5, 12.5, -16.5, -76.5, -65.5, -16.0]