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: ['5481', 'W', '1285', 'U', '6155', '1505', 'Z']

SOLUTION: 5481, 23, 1285, 21, 6155, 1505, 26

PROBLEM: ['a', 'D', 'q', 'w', '6693', 'O', '8325', 'w', '8903', 'l', '9361', 'e', '7757', 'Q', '2761', 'e', '1459', 'L', 'w', 'K', 'I', 'B']

SOLUTION: 1, 4, 17, 23, 6693, 15, 8325, 23, 8903, 12, 9361, 5, 7757, 17, 2761, 5, 1459, 12, 23, 11, 9, 2

PROBLEM: ['l', 'b', 'V', '5933', '4777', '5389', '9299', '421', 'P', '4141', 'M', 'F', 'd', 't', 'j', 'Y', 't', 'U', 'i', 'm', 'A', '7121']

SOLUTION:
12, 2, 22, 5933, 4777, 5389, 9299, 421, 16, 4141, 13, 6, 4, 20, 10, 25, 20, 21, 9, 13, 1, 7121