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: ['O', 'y', 'i', 'd', 'T', 'S', '4467', '6019', 'C', 'k', 'D', 'd', '1881', '483', 'u', 'g', '6927', 'M', '5449', 'u', 'l', '8235', 'q', 'p', '3997', 'C', '7039', '6837', 'b', '2295', 'v', 'T', '4349', '7765', 'd', '885', '3951', '5943', 'I']

15, 25, 9, 4, 20, 19, 4467, 6019, 3, 11, 4, 4, 1881, 483, 21, 7, 6927, 13, 5449, 21, 12, 8235, 17, 16, 3997, 3, 7039, 6837, 2, 2295, 22, 20, 4349, 7765, 4, 885, 3951, 5943, 9