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', 'G', 'X', '2849', 'l', 'D', 'O', '7941', 'h', 'A', '4061', 'l', '2453', 'S', 'm', 'K', '7145', 'Z', 'G', 'B', 'L', 'X', '9471', 'J', 'W', 'h', '8961', 'M', '3353']

7, 7, 24, 2849, 12, 4, 15, 7941, 8, 1, 4061, 12, 2453, 19, 13, 11, 7145, 26, 7, 2, 12, 24, 9471, 10, 23, 8, 8961, 13, 3353