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: ['7057', 'Y', 'P', 'S', '407', 'm', '7205', '5675', 'F', 'y', 'G', '829', 'M', '7735', '7425', '2375', 'r', 'm', 'i', 'y', 't']

7057, 25, 16, 19, 407, 13, 7205, 5675, 6, 25, 7, 829, 13, 7735, 7425, 2375, 18, 13, 9, 25, 20