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:
[-77, 76, 21, 100, 19]

Ex Output:
[-0.5, 48.5, 60.5, 59.5]


Ex Input:
[27, -75, 71, -18, -67, -62, 95, 3, 10]

Ex Output:
[-24.0, -2.0, 26.5, -42.5, -64.5, 16.5, 49.0, 6.5]


Ex Input:
[98, 47, -17]

Ex Output:

[72.5, 15.0]