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: ['K', '1881', '3221', '8807', 'q', 'O', 'k', 'A', '2403', '4217', '7453', '8551', 'O', '7377', 'n', 'g', '8401', '607', 'u', 'W', '9209', 'V', 'Y', 'k', '3903', '4591', '4743', '4133', '3557', '4357', '3749', 'D', '5883', 'K', 'D']

11, 1881, 3221, 8807, 17, 15, 11, 1, 2403, 4217, 7453, 8551, 15, 7377, 14, 7, 8401, 607, 21, 23, 9209, 22, 25, 11, 3903, 4591, 4743, 4133, 3557, 4357, 3749, 4, 5883, 11, 4