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:
[69, -90, -81, -41, -38, -41, 15, 55, 18, -24, 52, -55, 79, 84, -59]

Ex Output:
[-10.5, -85.5, -61.0, -39.5, -39.5, -13.0, 35.0, 36.5, -3.0, 14.0, -1.5, 12.0, 81.5, 12.5]


Ex Input:
[-21, 92, -76, 59, 41, -99, -5, 35, 92, 66, -50]

Ex Output:
[35.5, 8.0, -8.5, 50.0, -29.0, -52.0, 15.0, 63.5, 79.0, 8.0]


Ex Input:
[-91, 13, 67, -56, 43, -4, 25, -31, 80, 77, -56, -24, -9, -70, -9]

Ex Output:

[-39.0, 40.0, 5.5, -6.5, 19.5, 10.5, -3.0, 24.5, 78.5, 10.5, -40.0, -16.5, -39.5, -39.5]