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: ['4697', '3121', '3407', 'B', '7405', '6855', '7757', 'U', '5299', '3001', '2769', '6907', 'y', '3455', 'F', 'O', 'p', '4431', 'Q', 'C', '2905']

SOLUTION: 4697, 3121, 3407, 2, 7405, 6855, 7757, 21, 5299, 3001, 2769, 6907, 25, 3455, 6, 15, 16, 4431, 17, 3, 2905

PROBLEM: ['W', '985', 'N', 'w', '3923', 'J', 'D', 'M', '9409', 'h', 'Q', '5549', 'Q', '3901', 'y', '1885', '2033', '2695', '1469', 'H', '6489', 'J', 'n', 't', '9203', '4371', '25', 'T', '9249']

SOLUTION: 23, 985, 14, 23, 3923, 10, 4, 13, 9409, 8, 17, 5549, 17, 3901, 25, 1885, 2033, 2695, 1469, 8, 6489, 10, 14, 20, 9203, 4371, 25, 20, 9249

PROBLEM: ['7963', 'd', 'm', '6813', 'S', '8015', '8351', '6639', '417', 'T', 'o', '9985', 'k', 'S', '5495', 'I', '6273', '5411', '3833', 'q']

SOLUTION:
7963, 4, 13, 6813, 19, 8015, 8351, 6639, 417, 20, 15, 9985, 11, 19, 5495, 9, 6273, 5411, 3833, 17