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: ['1939', '7465', 't', '8401', '161', '7451', 'd', 'H', '4957', '5765', '19', '8981', 'n', 'i', 'B', 'r', 'o', '6653', '3671', 'r', 'e', '2403', 'X', 'y', '4993', '6411', 'D', '4645', '5033', '7297']

SOLUTION: 1939, 7465, 20, 8401, 161, 7451, 4, 8, 4957, 5765, 19, 8981, 14, 9, 2, 18, 15, 6653, 3671, 18, 5, 2403, 24, 25, 4993, 6411, 4, 4645, 5033, 7297

PROBLEM: ['o', 'y', 'C', 'L', '507', '7317', '2639', '6933', '797', '383', '4431', 'Z', 'y', '8811', 'O', 'a', 'G', 'Z', 'J', 'q', '1859', '9395', '8505', 'X', 'J', 'x', 'f', 'd', '2263', 'p', '5635', 'y', '9251', 'Z', 'K']

SOLUTION: 15, 25, 3, 12, 507, 7317, 2639, 6933, 797, 383, 4431, 26, 25, 8811, 15, 1, 7, 26, 10, 17, 1859, 9395, 8505, 24, 10, 24, 6, 4, 2263, 16, 5635, 25, 9251, 26, 11

PROBLEM: ['6447', '9993', '2147', '9653', '6323', 'n', 'C', 't', 'G', '7235', 'R', '7577', '6951', '8207', 't', 'h', 'b']

SOLUTION:
6447, 9993, 2147, 9653, 6323, 14, 3, 20, 7, 7235, 18, 7577, 6951, 8207, 20, 8, 2