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: ['M', '9701', '6255', '3365', '507', 'r', '297', '6885', '7657', 'b', 'Z', '659', 'f', 'S', '5505', '8945', '4609', '5407', '9367', 'V', '8367', '8295', '3391', 'H', '1569', 'e', 'k', '9961', 'H', '8207', 'H', 't', 'G', 'N', 'f', '5445', 'n', 'O', '9429']

13, 9701, 6255, 3365, 507, 18, 297, 6885, 7657, 2, 26, 659, 6, 19, 5505, 8945, 4609, 5407, 9367, 22, 8367, 8295, 3391, 8, 1569, 5, 11, 9961, 8, 8207, 8, 20, 7, 14, 6, 5445, 14, 15, 9429