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: ['k', '7585', 'Y', 'K', '5137', 'K', 'b', 'N', '3853', '821', '5969', 'x', '1557', '5847', '8875', 'W', 'O', '5011', 'r', 'J', '1833', '4645', '4319', '3937', '9919', 'u', 'e', '4463', 'e', '5005', '7759', '6573', '9995', 'X', 'H', '9967', 'r', 'o']

11, 7585, 25, 11, 5137, 11, 2, 14, 3853, 821, 5969, 24, 1557, 5847, 8875, 23, 15, 5011, 18, 10, 1833, 4645, 4319, 3937, 9919, 21, 5, 4463, 5, 5005, 7759, 6573, 9995, 24, 8, 9967, 18, 15