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: ['T', 'd', 'f', 'E', '5079', 'u', '2797', '5495', 'a', 'N', 'S']

20, 4, 6, 5, 5079, 21, 2797, 5495, 1, 14, 19