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: ['5659', '4599', '7015', 'x', 'G', 'X', '3461', 'P', 'q', '4307', '7415', '7341', '6139', '8483', '7081', '7993', 'B', '6347', 'L', 'P', '2799', 'f', 'l', 'g', '5039', '355', 'G', 'Y', '2213', 't', 'L', '7487', '8857']

5659, 4599, 7015, 24, 7, 24, 3461, 16, 17, 4307, 7415, 7341, 6139, 8483, 7081, 7993, 2, 6347, 12, 16, 2799, 6, 12, 7, 5039, 355, 7, 25, 2213, 20, 12, 7487, 8857