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: ['3451', 'J', '801', 'y', 'b', 'W', '3241', '2621', 'y', 'a', '1671', 'g', '389', 'H', '5763', 'A', '6051', 'u', 'I', '2599', 'o', 'B', '4867', '725', '5345', '1719', '885', 'E', '6397', '7979', 'y', 'S', 'A', 'L']

3451, 10, 801, 25, 2, 23, 3241, 2621, 25, 1, 1671, 7, 389, 8, 5763, 1, 6051, 21, 9, 2599, 15, 2, 4867, 725, 5345, 1719, 885, 5, 6397, 7979, 25, 19, 1, 12