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: ['2973', 'a', '6251', 's', '5009', 'm', 'G']

SOLUTION: 2973, 1, 6251, 19, 5009, 13, 7

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: ['1919', '2925', '4783', 'b', 'k', 'E', '7861', '8043', 'k', 'N', 'c', '4017', '2171', 'S', '6713', '8727', 'L', 'm', 'V', 'f', 'N', 'a', '3577', 'i', 'r']

SOLUTION:
1919, 2925, 4783, 2, 11, 5, 7861, 8043, 11, 14, 3, 4017, 2171, 19, 6713, 8727, 12, 13, 22, 6, 14, 1, 3577, 9, 18