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: ['F', '6189', '7771', '7897', '7601', '2917', 'r', '3885', 'W', 'a', '3097']

6, 6189, 7771, 7897, 7601, 2917, 18, 3885, 23, 1, 3097