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:
[-7, 40, 98, 92, -81, 78, -22, 21]

Ex Output:
[16.5, 69.0, 95.0, 5.5, -1.5, 28.0, -0.5]


Ex Input:
[58, -15]

Ex Output:
[21.5]


Ex Input:
[94, -61, -83, -74, 14, 56, -19, -20, -91, 39, -78]

Ex Output:

[16.5, -72.0, -78.5, -30.0, 35.0, 18.5, -19.5, -55.5, -26.0, -19.5]