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: ['C', 'h', '169', '9701', '1159', 'p', '1455', 'J', 'O', '8191', 'c', 'T', '1349', '1733', '417', '7339', '1251', '6467', '1707', 'v', '9493', '1965', 'w', 'K', '5819', '3937', '4785', '5015', 'K', '7353']

3, 8, 169, 9701, 1159, 16, 1455, 10, 15, 8191, 3, 20, 1349, 1733, 417, 7339, 1251, 6467, 1707, 22, 9493, 1965, 23, 11, 5819, 3937, 4785, 5015, 11, 7353