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: ['3219', '9507', 'b', 'X', '4735', '7753', '9793', '2465', '4945', '9181', '475', 'q', '5189', '4797', '4325', 'X', '1347', 'p', '649']

3219, 9507, 2, 24, 4735, 7753, 9793, 2465, 4945, 9181, 475, 17, 5189, 4797, 4325, 24, 1347, 16, 649