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: ['s', 't', '8775', '1369', 'I', '9961', 'A', '3193', 't', 'q', 'j', 's', 'T', 'S', 'T', '4987', '3323', 'o', 'y', 'o', 't', '5371', 'S', 'r', '6375', '3689', '5829', 'O', '4955', 'x', 'M']

19, 20, 8775, 1369, 9, 9961, 1, 3193, 20, 17, 10, 19, 20, 19, 20, 4987, 3323, 15, 25, 15, 20, 5371, 19, 18, 6375, 3689, 5829, 15, 4955, 24, 13