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: ['i', '5103', '9407', '6703', 'q', 'W', 'y', '2667', '1847', '2019', 'Z', '6393', '2369', 'i', '3965', '3439', 'y', '4237', 'e']

9, 5103, 9407, 6703, 17, 23, 25, 2667, 1847, 2019, 26, 6393, 2369, 9, 3965, 3439, 25, 4237, 5