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: ['I', 'd', 'l', 'f', '13', '3381', 'J', '2743', '3269', '5913', 'j', 'p', 'v', 'u', 'n', 'Q', 'r', 'g', 'p', 'q', '3821', 'H', 'r', 'z', '5999', 'M', 'y']

9, 4, 12, 6, 13, 3381, 10, 2743, 3269, 5913, 10, 16, 22, 21, 14, 17, 18, 7, 16, 17, 3821, 8, 18, 26, 5999, 13, 25