TASK 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.
PROBLEM: ['2803', '8285', 'U', 'O', '9329', '695', '3877', '1873', '2365', 'P', '153', 'D', '8495', '7593', '4067', 'Y', 'u', '4885', 'f', 'B', 'o', '8499']

SOLUTION: 2803, 8285, 21, 15, 9329, 695, 3877, 1873, 2365, 16, 153, 4, 8495, 7593, 4067, 25, 21, 4885, 6, 2, 15, 8499

PROBLEM: ['i', '1075', 'r', '4813', 'N', 'Z', '6071', '1829', 'h', '2477']

SOLUTION: 9, 1075, 18, 4813, 14, 26, 6071, 1829, 8, 2477

PROBLEM: ['1197', 'L', '9927', '2405', '5123', '2371', 'y', '2781', '549', '8363', '9347', '4283', 'j', '2183', 's', 'K', 'Q', '9547', 's', '8325', 'S', 'T', '8837']

SOLUTION:
1197, 12, 9927, 2405, 5123, 2371, 25, 2781, 549, 8363, 9347, 4283, 10, 2183, 19, 11, 17, 9547, 19, 8325, 19, 20, 8837