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: ['g', '4633', '4819', 'b', '7939', 'G', 'W', '4557', '1359', '813', 'p', '2977', 'e']

7, 4633, 4819, 2, 7939, 7, 23, 4557, 1359, 813, 16, 2977, 5