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: ['1039', '4485', '349', 'n', '3407', 'J', 'T', 'q', '6557', '2681', 'D', 'x', '1675', '7917', '8523', '361', '7965', 'l', '2475', 'H', '4987', 'v', 'G']

1039, 4485, 349, 14, 3407, 10, 20, 17, 6557, 2681, 4, 24, 1675, 7917, 8523, 361, 7965, 12, 2475, 8, 4987, 22, 7