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', '9821', 'k', '4663', 'v', 'r', 'N', 'I', 'x', '9133', 'I', 'o', 'n', '6159', 'g', 'U', '5579', 'Y', 't', 'a', 'A']

SOLUTION: 12, 9821, 11, 4663, 22, 18, 14, 9, 24, 9133, 9, 15, 14, 6159, 7, 21, 5579, 25, 20, 1, 1

PROBLEM: ['W', 'A', '4455', '9201', 'B', '2315', '2057', '5139', 'f', 'M', 'l', 'h', '5639', 'd', '125', '5483', 'I', '6603', '4363', 'B', 'O', 'z', '6093', 'x', 'p', '6141', '5013', 'n', 'W', '1603']

SOLUTION: 23, 1, 4455, 9201, 2, 2315, 2057, 5139, 6, 13, 12, 8, 5639, 4, 125, 5483, 9, 6603, 4363, 2, 15, 26, 6093, 24, 16, 6141, 5013, 14, 23, 1603

PROBLEM: ['7629', 'O', 'N', 'f', 'f', '5963', 'Q', 't', '9039', '2063', '4063', 'j', 'p', '8701', 'e', '8453', 'g', '3469', '6215', '1275', '2589', 'l', '2047', '2743', 'O', 'E']

SOLUTION:
7629, 15, 14, 6, 6, 5963, 17, 20, 9039, 2063, 4063, 10, 16, 8701, 5, 8453, 7, 3469, 6215, 1275, 2589, 12, 2047, 2743, 15, 5