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', 'M', '9547', '9787', 'C', '6993', '5623', 'N', 'x', '3495', '6071', '5413', 'Y', '5191', '9621', 'X', '8557', '7949', '5691', 'u', '7527', '621', '6899', 'E', 'K', 'a']

SOLUTION: 12, 13, 9547, 9787, 3, 6993, 5623, 14, 24, 3495, 6071, 5413, 25, 5191, 9621, 24, 8557, 7949, 5691, 21, 7527, 621, 6899, 5, 11, 1

PROBLEM: ['951', 'Q', '7521', 'U', 'm', 'W', '2597', '8493', '5641', '7459', '5085', 'Y', '1529', 'D', 'M', 'z', '2251', 'z', 'F', 'z', 'T', '2743', '1999', '6165', 'Y', '5187', 'v', '195', '4955', 'Q', '9337', '8577']

SOLUTION: 951, 17, 7521, 21, 13, 23, 2597, 8493, 5641, 7459, 5085, 25, 1529, 4, 13, 26, 2251, 26, 6, 26, 20, 2743, 1999, 6165, 25, 5187, 22, 195, 4955, 17, 9337, 8577

PROBLEM: ['5767', '9373', '5455', '6805', 'b', 'n', 'B', '6561', '8265', '7781', '6743', 'R', 'U', '7749', 'K', '193', '4771', '5377', 'Q', '4617', '7495', 'T', 'y', 'k', '2869', '2475', '9159', 'P', 'H', 'z', '7633', 'Q', '7813', '8989', 'T', '5063', 'v', 'J']

SOLUTION:
5767, 9373, 5455, 6805, 2, 14, 2, 6561, 8265, 7781, 6743, 18, 21, 7749, 11, 193, 4771, 5377, 17, 4617, 7495, 20, 25, 11, 2869, 2475, 9159, 16, 8, 26, 7633, 17, 7813, 8989, 20, 5063, 22, 10