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: ['P', 'd', 'h', '3675', '4097', '8175', 'J', '2969', '7661', '3369', '4853', 'D', 'r', '5063', 'c', '1449', '5189', '4751', 'e', 'g', '7321', 'J', '6611', 'B', '9913', '5165', '7245', '9539']

16, 4, 8, 3675, 4097, 8175, 10, 2969, 7661, 3369, 4853, 4, 18, 5063, 3, 1449, 5189, 4751, 5, 7, 7321, 10, 6611, 2, 9913, 5165, 7245, 9539