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: ['8217', '5723', 'o', 'M', 'P', 'w', 'H', '233', '7417', '3223', '1185', 'W', '9875', '6363', 'y']

SOLUTION: 8217, 5723, 15, 13, 16, 23, 8, 233, 7417, 3223, 1185, 23, 9875, 6363, 25

PROBLEM: ['O', '1727', '8139', 'm', '605', 'Z', '8309', 'i', 'S', 'k', 'j', '5531', '5123', '6525', 'V', 'g', 'Z', 'z', '4765', '4567', '3539', '3387', 's', 'j', 'e', 'J', '7757', 'B', '6923', '2003', '9083', '2147', '5409', 'S', 'l', 'g', '1777', 'B', 'p']

SOLUTION:
15, 1727, 8139, 13, 605, 26, 8309, 9, 19, 11, 10, 5531, 5123, 6525, 22, 7, 26, 26, 4765, 4567, 3539, 3387, 19, 10, 5, 10, 7757, 2, 6923, 2003, 9083, 2147, 5409, 19, 12, 7, 1777, 2, 16