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: ['899', '6077', '7779', '9959', 'B', 'C', 'c', '5977', '9611', 'p', '8013', 'r', '665', 'Z', 'i', '2099', 'w', '4795']

SOLUTION: 899, 6077, 7779, 9959, 2, 3, 3, 5977, 9611, 16, 8013, 18, 665, 26, 9, 2099, 23, 4795

PROBLEM: ['V', '5079', '2387', '1973', '3285', 'S', 'm', '3355', 'i', 'R', 'K', '1343', '1213', '4117', '7345', 'v', '1471', '3997', '3043', '7253', 'g']

SOLUTION:
22, 5079, 2387, 1973, 3285, 19, 13, 3355, 9, 18, 11, 1343, 1213, 4117, 7345, 22, 1471, 3997, 3043, 7253, 7