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: ['l', '5497', 'l', 'Y', '61', '1341', '8131', '6295', '4549', 'g', 'Y']

12, 5497, 12, 25, 61, 1341, 8131, 6295, 4549, 7, 25