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: ['G', 'j', '2009', '4983', 'J', 'q', 'T', '3633', '991', 'J', 'E', 'S', '5749', 'l', '8279', '4777', '8697', 'c', 'g', '903', 'r', '8995', '5901', '4571', 't', 'x', 'D', '4659']

7, 10, 2009, 4983, 10, 17, 20, 3633, 991, 10, 5, 19, 5749, 12, 8279, 4777, 8697, 3, 7, 903, 18, 8995, 5901, 4571, 20, 24, 4, 4659