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: ['l', 'F', 'o', '8761', 'o', 't', '2151', '1421', '9381', 'o', '8687', 'i', 'B', '7911', '2759', 'M', '4555', '3747', '145', 'W']

SOLUTION: 12, 6, 15, 8761, 15, 20, 2151, 1421, 9381, 15, 8687, 9, 2, 7911, 2759, 13, 4555, 3747, 145, 23

PROBLEM: ['i', 'P', '227', '5575', 'O', 'l', '9041', 'q', '3695', '6189', 'x', 'z', 'R', '297', 'b', '5055', 'y', 'k', '4049', 'q', 'Z', '635', '5995', '2277', '6733']

SOLUTION: 9, 16, 227, 5575, 15, 12, 9041, 17, 3695, 6189, 24, 26, 18, 297, 2, 5055, 25, 11, 4049, 17, 26, 635, 5995, 2277, 6733

PROBLEM: ['b', '6751', '9437', 'O', '1469', 'H', 'o', '659', 'F', '2639', 'C', '4177', 'E', 'g', '7327', 'M', '9875', 'B', '41', 'o', 'a', 'j', '8185', '6519', 'z', 'N', 'i', '5159']

SOLUTION:
2, 6751, 9437, 15, 1469, 8, 15, 659, 6, 2639, 3, 4177, 5, 7, 7327, 13, 9875, 2, 41, 15, 1, 10, 8185, 6519, 26, 14, 9, 5159