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: ['7829', '1519', '7889', '3593', '7971', '1413', '4549', 'h', 'i', 'A', 'p', 'H', '1099', 'L', '3487', '5211', '5529', 'l', 'B', 'r', 'd', 'z', '7863', '2253', '8627']

7829, 1519, 7889, 3593, 7971, 1413, 4549, 8, 9, 1, 16, 8, 1099, 12, 3487, 5211, 5529, 12, 2, 18, 4, 26, 7863, 2253, 8627