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', '1849', '3051', 'N', 'N', '3119', 'I', '4427', '9609', 't', 'X', 'b', 'U', 'S', 's', 's', 'Q', '3107', 'L', '1027', 'i', 'B', '8847', '6773', '4247', '2853', '6797', '5857', '4859', '1087', 'L', 'b', '8195', '329', 'e', 'J', 'Q', '93', '4017', '4487']

6, 1849, 3051, 14, 14, 3119, 9, 4427, 9609, 20, 24, 2, 21, 19, 19, 19, 17, 3107, 12, 1027, 9, 2, 8847, 6773, 4247, 2853, 6797, 5857, 4859, 1087, 12, 2, 8195, 329, 5, 10, 17, 93, 4017, 4487