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:
[1, 77, 55, -37, -65, 80, 31, -37, -61, 3, -80]

Ex Output:
[39.0, 66.0, 9.0, -51.0, 7.5, 55.5, -3.0, -49.0, -29.0, -38.5]


Ex Input:
[-53, 31, 52]

Ex Output:
[-11.0, 41.5]


Ex Input:
[-7, -58, -80, 20, 20, -8, 98, 24, 65, 25, -57, 38, -42]

Ex Output:

[-32.5, -69.0, -30.0, 20.0, 6.0, 45.0, 61.0, 44.5, 45.0, -16.0, -9.5, -2.0]