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: ['4817', 'A', '7395', 'n', '5439', '7455', 'm', '9735', 'a', 'Z', 'N', 's', 'N', '6833', '8797', 'F', '2775', 'Q', '9111', 'B', '9803', 'r', 'd', '3995', 'd', '2809', '3843', 'K', 'A']

4817, 1, 7395, 14, 5439, 7455, 13, 9735, 1, 26, 14, 19, 14, 6833, 8797, 6, 2775, 17, 9111, 2, 9803, 18, 4, 3995, 4, 2809, 3843, 11, 1