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: ['6423', 'y', '4107', 'K', '563', 'g', 'S', 'D', '5293', 'w', '4189', '8805', 'Q', '8621', 'U', '1393', '6495', '9149', '8955', '1383', '5303', '7557', '7061', '2173', 'z', '9339', 'J', '9159', 't', '4575', '3643', 'v', 'W', '2163', '2449', 'D', 'Q', 'h']

6423, 25, 4107, 11, 563, 7, 19, 4, 5293, 23, 4189, 8805, 17, 8621, 21, 1393, 6495, 9149, 8955, 1383, 5303, 7557, 7061, 2173, 26, 9339, 10, 9159, 20, 4575, 3643, 22, 23, 2163, 2449, 4, 17, 8