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: ['d', 'b', '1323', 'w', 'J', '8879', 'H', '713', 'v', '5453', '771', 'T', '8413', '7467', 'y', '4899', 'x', 'C']

4, 2, 1323, 23, 10, 8879, 8, 713, 22, 5453, 771, 20, 8413, 7467, 25, 4899, 24, 3