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: ['E', 'w', '455', 'k', '5775', 'A', 'g', '9995', '7503', 'o', '8059', 'u', 'Y', 'g', '5471', '5257', 'w', 'e', '8639', '9771', 'o', '6163', 'I', 'N']

5, 23, 455, 11, 5775, 1, 7, 9995, 7503, 15, 8059, 21, 25, 7, 5471, 5257, 23, 5, 8639, 9771, 15, 6163, 9, 14