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: ['8465', '4059', 'r', 'F', 'Z', '6817', '4449', 'X', 'H', 'Y', '2603', 'D', '1297', '1933', 'w', 'P', 'k', 'j', '7275', '9393', 's', '9439', 'l', 'B', 'I', 'o', '4287', '7851', 'X', 'v', 'D', 'B', 'H', '2121', '1579']

8465, 4059, 18, 6, 26, 6817, 4449, 24, 8, 25, 2603, 4, 1297, 1933, 23, 16, 11, 10, 7275, 9393, 19, 9439, 12, 2, 9, 15, 4287, 7851, 24, 22, 4, 2, 8, 2121, 1579