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: ['3853', '8887', '9623', '6635', '73', 'T', '9323', 'G', 'r', '639', 'r', 'Q', '7139', '1523', 'q', '7847', 'g', '5153', '8677', 'h', '9351', '3585', '2013', 'l', '1227', '5817', 'L', '3355', '9329', 'n', 'J', 'j', '9881', '1981', '1665']

3853, 8887, 9623, 6635, 73, 20, 9323, 7, 18, 639, 18, 17, 7139, 1523, 17, 7847, 7, 5153, 8677, 8, 9351, 3585, 2013, 12, 1227, 5817, 12, 3355, 9329, 14, 10, 10, 9881, 1981, 1665