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: ['5845', 'm', 'p', '91', '5137', 'a', 'X', 'i', 'i', 'i', 'M', '6157', 'R', 'R', '6125', 'N', '4643', '405', '2609', 'y', 'w', '5281', '2061', 'x', 'J', '1383', 'a', '685', 'x', '6035', 'm', 'Q', 'L', 'n', '1691', '4253', 'h']

5845, 13, 16, 91, 5137, 1, 24, 9, 9, 9, 13, 6157, 18, 18, 6125, 14, 4643, 405, 2609, 25, 23, 5281, 2061, 24, 10, 1383, 1, 685, 24, 6035, 13, 17, 12, 14, 1691, 4253, 8