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: ['f', '9983', '2529', 'X', 'F', 'm', 'v', '3691', '6389', 'N', '8463', '8375', '6997', '4521', '1209', 'S', '3363', 'e', '1639', 'y', 'g', 'Y', 'w', '5519', '743', '4047', 'A', '4595', '2533', 'p', '8093', '2169']

6, 9983, 2529, 24, 6, 13, 22, 3691, 6389, 14, 8463, 8375, 6997, 4521, 1209, 19, 3363, 5, 1639, 25, 7, 25, 23, 5519, 743, 4047, 1, 4595, 2533, 16, 8093, 2169