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: ['U', '1531', 't', '6929', 'P', '9619', 'G', 'g', '8511']

SOLUTION: 21, 1531, 20, 6929, 16, 9619, 7, 7, 8511

PROBLEM: ['z', 'f', '5867', '3475', 'A', '4535', 'm', 'S', '1189', '3275', '3249', 'a', 'K', '2015', 'W', '6543', 'O', 'K', 'E', 'C', 'O', '5889', '6795', 'M', 'A', 'p', '4315', '9367', 'i', '5781', '875', '7125', 'i', 'H', '4399', '3707', '7141', 'E', 'z']

SOLUTION: 26, 6, 5867, 3475, 1, 4535, 13, 19, 1189, 3275, 3249, 1, 11, 2015, 23, 6543, 15, 11, 5, 3, 15, 5889, 6795, 13, 1, 16, 4315, 9367, 9, 5781, 875, 7125, 9, 8, 4399, 3707, 7141, 5, 26

PROBLEM: ['G', '8101', '4633', '5281', 's', '4507', '6213', 'q', '4803', '4961', '8381', 'D', '4723', 'e', '2031', '2033', '5415', '3873', '4871']

SOLUTION:
7, 8101, 4633, 5281, 19, 4507, 6213, 17, 4803, 4961, 8381, 4, 4723, 5, 2031, 2033, 5415, 3873, 4871