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:
[-83, -69, -51, 12, 67, 99, 74, 77, -6, -81, -13, -70, -34, -8, 25]

Ex Output:
[-76.0, -60.0, -19.5, 39.5, 83.0, 86.5, 75.5, 35.5, -43.5, -47.0, -41.5, -52.0, -21.0, 8.5]


Ex Input:
[22, -56]

Ex Output:
[-17.0]


Ex Input:
[-99, 59, 65, 40, 42, -58, 54, 47, 51, -65, -75, 7]

Ex Output:

[-20.0, 62.0, 52.5, 41.0, -8.0, -2.0, 50.5, 49.0, -7.0, -70.0, -34.0]