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', '7791', 'F', 'U', 'c', 'a', '2613', '6179', '5429', '9281', '6721', 'T', '5043', '8027', 'Z', 'g', 'w', '1767', '9987', 'M', '7817', '5843', '6435', '8875', '7727', 'm', 'G', '685', '6071', 'Q', '9069', '3011']

19, 7791, 6, 21, 3, 1, 2613, 6179, 5429, 9281, 6721, 20, 5043, 8027, 26, 7, 23, 1767, 9987, 13, 7817, 5843, 6435, 8875, 7727, 13, 7, 685, 6071, 17, 9069, 3011