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: ['5445', '5961', 'Y', 'E', '8771', '6475', 'P', '5947', '4139']

SOLUTION: 5445, 5961, 25, 5, 8771, 6475, 16, 5947, 4139

PROBLEM: ['d', '7689', 'l', '2225', '2653', 'o', 'P', '767', '9077', '1799', '7917', '43', '6633', '9857', '3307', 'J', 'R', 'Y', '5243', '4523', '577']

SOLUTION: 4, 7689, 12, 2225, 2653, 15, 16, 767, 9077, 1799, 7917, 43, 6633, 9857, 3307, 10, 18, 25, 5243, 4523, 577

PROBLEM: ['I', '3347', '6483', '8983', '3557', 'T', 'V', 'H', '4155', 'l', '8001', 'n', 'C', '8395', '3865', 'J', 'f', 'p']

SOLUTION:
9, 3347, 6483, 8983, 3557, 20, 22, 8, 4155, 12, 8001, 14, 3, 8395, 3865, 10, 6, 16