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: ['L', 'g', '3557', 'Z', 'u', '5249', 'Q', '9653', 'p', '509', '6765', '8167', '6263', 'b', '177', 'J', 'q', 'z', 'w', 'r', '4803', 'G']

12, 7, 3557, 26, 21, 5249, 17, 9653, 16, 509, 6765, 8167, 6263, 2, 177, 10, 17, 26, 23, 18, 4803, 7