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: ['395', 'e', '6053', 'l', 'x', '45', '3439', 'E', '771', '8905']

395, 5, 6053, 12, 24, 45, 3439, 5, 771, 8905