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: ['4847', '5933', '6709', 'T', 'i', 'z', 'l', 'u', '1309', 'c', 'w', '3843', 'W', '7727', 'e', '1751', '7665', '5199', 'u', 'd', 'y', 'p', '2181', '3493', '1643', 'e', '6835', 'O', '5837', 'B', 'A', 'E', 'e', 'c', '3725', '7049']

4847, 5933, 6709, 20, 9, 26, 12, 21, 1309, 3, 23, 3843, 23, 7727, 5, 1751, 7665, 5199, 21, 4, 25, 16, 2181, 3493, 1643, 5, 6835, 15, 5837, 2, 1, 5, 5, 3, 3725, 7049