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: ['5101', '803', 'I', 'H', '5641', '83', '7349', 'T', 'e', 'X', '423', 'I', 'm', 'l', '7995', 'v', '119', 'T', '6003', '6101', '6115', 'Z', 'n', '9737', '1233', '4945', '5255', 'r', '9349', 'O']

5101, 803, 9, 8, 5641, 83, 7349, 20, 5, 24, 423, 9, 13, 12, 7995, 22, 119, 20, 6003, 6101, 6115, 26, 14, 9737, 1233, 4945, 5255, 18, 9349, 15