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: ['N', '8371', 'j', '9581', 'm', '9723', 't', '153', 'C', '2723', 'Q', '487', 'K', 'T', 'v', '9307', 'v', 'P', '769', 'q', 'd', 'D', '1127', 'H', 'R', '5393', '5321', '7621']

14, 8371, 10, 9581, 13, 9723, 20, 153, 3, 2723, 17, 487, 11, 20, 22, 9307, 22, 16, 769, 17, 4, 4, 1127, 8, 18, 5393, 5321, 7621