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: ['775', 'P', 'd', '1625', 'L', 'K', 'I', 'A', '2501', '5383', '1325', 'O', '6387', 'P', '6523', 'x', 'd', 'r', 's', 'n', '6709', 'h', '9587']

775, 16, 4, 1625, 12, 11, 9, 1, 2501, 5383, 1325, 15, 6387, 16, 6523, 24, 4, 18, 19, 14, 6709, 8, 9587