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: ['8537', 'a', '1177', '3821', '8255', 'u', 'W', 'Y', 'j', 'v', '3871', 'p', 'C', '3387', 'V', 'J', 'b', 'B', 'k', '5301', '5955', '5459', 'z', '2125', 'z', '4781']

8537, 1, 1177, 3821, 8255, 21, 23, 25, 10, 22, 3871, 16, 3, 3387, 22, 10, 2, 2, 11, 5301, 5955, 5459, 26, 2125, 26, 4781