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: ['4489', '395', 'p', '2601', 'T', 'S', '1835', 'J', 'J', '9563', '4663', 'l', '5029', '471', '1281', '1157', '93', '1799', 'x', 'd', '8779', '8633', '431', '5821']

4489, 395, 16, 2601, 20, 19, 1835, 10, 10, 9563, 4663, 12, 5029, 471, 1281, 1157, 93, 1799, 24, 4, 8779, 8633, 431, 5821