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: ['p', '1315', '6713', 'd', 'i', '3215', 'H', 'A', '7605', '1241', '2897', 'N', '87', 'n', 'O', '8011', '4455', 'Q', 'W', 'w', '5365', 'u', '3979', '7217', '823', '5027', '2401', 'k', '4241', 'k', 'u', 'G', '887']

16, 1315, 6713, 4, 9, 3215, 8, 1, 7605, 1241, 2897, 14, 87, 14, 15, 8011, 4455, 17, 23, 23, 5365, 21, 3979, 7217, 823, 5027, 2401, 11, 4241, 11, 21, 7, 887