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: ['8593', '441', '9485', '7861', 'K', 'l', '2507', 'z', '4211', 'p', 'H']

8593, 441, 9485, 7861, 11, 12, 2507, 26, 4211, 16, 8