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: ['3429', 'H', '6027', '4551', 'H', '8149', 'B', '8795', 'y', 'Z', '229', 's', 'w', '5593', '5045', '4421', 'T', '9277', 'O', 'I', 'j']

3429, 8, 6027, 4551, 8, 8149, 2, 8795, 25, 26, 229, 19, 23, 5593, 5045, 4421, 20, 9277, 15, 9, 10