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: ['F', '239', 'A', '2177', '2833', '2271', '7905', 'v', 'k', 'M', 'k', 'i', 'D', 'T', 'j', '731', 'U', '3843', '6509', '3907', 'W', '8495', '9307', '7427', '4681', 'E']

6, 239, 1, 2177, 2833, 2271, 7905, 22, 11, 13, 11, 9, 4, 20, 10, 731, 21, 3843, 6509, 3907, 23, 8495, 9307, 7427, 4681, 5