Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['201', 'v', '9339', '2255', 'A', 'F', '2731', '1331', '709', '1319', 'u', '5037']

201, 22, 9339, 2255, 1, 6, 2731, 1331, 709, 1319, 21, 5037