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: ['j', '9807', '5493', '1663', 'M', 's', '9813', 'U', 'r', 'w', '2609', '2443', 'j', '6813', 'n', 'g', '4457', 'J', '969', 'S', 'r', '6207', '3151', '4559', 'M', '8891', 'V', '23', '1653', '7159', 'L', 'x', 'L', '237', 'o', '7141', 't', 'G']

10, 9807, 5493, 1663, 13, 19, 9813, 21, 18, 23, 2609, 2443, 10, 6813, 14, 7, 4457, 10, 969, 19, 18, 6207, 3151, 4559, 13, 8891, 22, 23, 1653, 7159, 12, 24, 12, 237, 15, 7141, 20, 7