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: ['6675', '5785', 'u', '7293', 'K', '6407', 'k', 'x', '585', 'd', 'E', '2429', 'a', '2417', '7571', '7073', 't', 'Z', '5597', '5555', 'x', 'e', '7913', 'i', '3921', 'M', 'b', 'Y', '3885', '7989']

6675, 5785, 21, 7293, 11, 6407, 11, 24, 585, 4, 5, 2429, 1, 2417, 7571, 7073, 20, 26, 5597, 5555, 24, 5, 7913, 9, 3921, 13, 2, 25, 3885, 7989