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: [72, -90, -99, -88, -87, -26, -40, -45, 69, 32, 57, 21, -67]

Output: [-9.0, -94.5, -93.5, -87.5, -56.5, -33.0, -42.5, 12.0, 50.5, 44.5, 39.0, -23.0]


Input: Consider Input: [81, 73]

Output: [77.0]


Input: Consider Input: [-46, -57, 50, 56, -69, -53]


Output: [-51.5, -3.5, 53.0, -6.5, -61.0]