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: ['D', 'l', '4077', '845', '5849', 'z', '2645', '893', '7475', 'F', '4809', '1361', '6099', 'S', 'q', '2637', 'A', 'A', 'u', 'j', '7989', '1219', '4577', '507', '3501', '2601', 'P', '7459', 'D', 'L', '7909', 'm', 'W', '5513', 'F', '2521', 'A', '3269', '9353', 'M']

4, 12, 4077, 845, 5849, 26, 2645, 893, 7475, 6, 4809, 1361, 6099, 19, 17, 2637, 1, 1, 21, 10, 7989, 1219, 4577, 507, 3501, 2601, 16, 7459, 4, 12, 7909, 13, 23, 5513, 6, 2521, 1, 3269, 9353, 13