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].

Input: Consider Input: [42, -57, 62, 14, -89, 19, 56, -90, 32, 21, -2, -9]

Output: [-7.5, 2.5, 38.0, -37.5, -35.0, 37.5, -17.0, -29.0, 26.5, 9.5, -5.5]


Input: Consider Input: [57, 81, -99]

Output: [69.0, -9.0]


Input: Consider Input: [52, 23, 85, 51]


Output: [37.5, 54.0, 68.0]