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: ['B', '9795', '4489', 'o', '1249', '1645', 'c', 'd', '2391', 'l', 'J', '6753', 'C', 'e', 'k', 'Y', 'b', '4981', 'K', 'H', 'a', '1415', '3621', '4473', 'M', '3451', '535', 'G', '8027', 'I', '8653', 'r', 'Q', 'a', '9955', 'g', 'K']

2, 9795, 4489, 15, 1249, 1645, 3, 4, 2391, 12, 10, 6753, 3, 5, 11, 25, 2, 4981, 11, 8, 1, 1415, 3621, 4473, 13, 3451, 535, 7, 8027, 9, 8653, 18, 17, 1, 9955, 7, 11