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, -25, -52]

Ex Output:
[-6.5, -38.5]


Ex Input:
[-31, 21, -23]

Ex Output:
[-5.0, -1.0]


Ex Input:
[-20, -74, -10, -5, -89, -65, -20, 32, -45, 20, -38, 45]

Ex Output:

[-47.0, -42.0, -7.5, -47.0, -77.0, -42.5, 6.0, -6.5, -12.5, -9.0, 3.5]