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: ['2057', 'z', '2519', 'L', 'K', '1299', 'V', '8657', 'W', 'Q', '7703', '5731', '1039', 'E', 'b', 'S', '3411', 'O', 'p', '417', 'E', '4895', 'a', '4799', 'O', 'E', 'u', '183', 'A']

2057, 26, 2519, 12, 11, 1299, 22, 8657, 23, 17, 7703, 5731, 1039, 5, 2, 19, 3411, 15, 16, 417, 5, 4895, 1, 4799, 15, 5, 21, 183, 1