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: ['4897', 'E', '1117', 'G', 'I', '9531', 'k', '6309', '9137', 'D', '6151', 'K', '3341', '1055', '2437', '2319', 'd', 'x', '4925', '9287', '3245']

4897, 5, 1117, 7, 9, 9531, 11, 6309, 9137, 4, 6151, 11, 3341, 1055, 2437, 2319, 4, 24, 4925, 9287, 3245