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: ['5983', '6511', 'Q', '6227', 'Q', '3815', 'o', 'T', '1475', 'p', 'Y', '4521', '5055', 'w', 'v', 'f', 'z', '2077', 'i', 'U', '8149', '5721', '1449', '3459', 'N', '223', '647', '3775', 'r', '9547', '4195', '1693', 'L', 'i', '2725', '471']

5983, 6511, 17, 6227, 17, 3815, 15, 20, 1475, 16, 25, 4521, 5055, 23, 22, 6, 26, 2077, 9, 21, 8149, 5721, 1449, 3459, 14, 223, 647, 3775, 18, 9547, 4195, 1693, 12, 9, 2725, 471