Instructions: 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: ['2511', '669', 'i', '7119', '5335', '1725', 'h']
Output:
2511, 669, 9, 7119, 5335, 1725, 8