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: ['b', 'o', 'E', '3349', '3065', '427', '635', 'r', 'L', '1955', '7645', '7123', 'E', '3781', 'L', 'O', '1255', 'R', '8671', 'k', 'n', '3199', '6251', '2839', 'L', 'X', 'h', '3479', 'R', 'O', '1289', '8729', '6665', '7729', 'I', '1639', 'Q']

2, 15, 5, 3349, 3065, 427, 635, 18, 12, 1955, 7645, 7123, 5, 3781, 12, 15, 1255, 18, 8671, 11, 14, 3199, 6251, 2839, 12, 24, 8, 3479, 18, 15, 1289, 8729, 6665, 7729, 9, 1639, 17