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: ['z', 'K', '2321', '5441', '5257', 'F', 't', '2973', '7263', '9205', '1085', '3879', '8297', '451', 'R', 'X', 'x', '9791', '9363', '2983']

SOLUTION: 26, 11, 2321, 5441, 5257, 6, 20, 2973, 7263, 9205, 1085, 3879, 8297, 451, 18, 24, 24, 9791, 9363, 2983

PROBLEM: ['7463', 'x', 'w', 'y', '3185', '4319', 'C', 'X', '3279', 'S', 'z', 'e', '3423', '4775', '4381', 'U', '477', 'K', '5501', '2059', '9307', '8603', '3199', 'r', '8801', 'b', '7387']

SOLUTION: 7463, 24, 23, 25, 3185, 4319, 3, 24, 3279, 19, 26, 5, 3423, 4775, 4381, 21, 477, 11, 5501, 2059, 9307, 8603, 3199, 18, 8801, 2, 7387

PROBLEM: ['2621', '8811', '3613', '7469', 'O', 'P', '3429', '6091', 'l', '6905', '8189', '8933', 'l', '1745', 'c', 'a', '8665', '9733', '8263', 'X', '5065', 'W', '1837', 'K', 'k', '519', '7623']

SOLUTION:
2621, 8811, 3613, 7469, 15, 16, 3429, 6091, 12, 6905, 8189, 8933, 12, 1745, 3, 1, 8665, 9733, 8263, 24, 5065, 23, 1837, 11, 11, 519, 7623