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: ['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: ['3059', '4039', 'c', 'R', '7329', 'm', 'E', 'R', '1231', '6861', '29']

SOLUTION: 3059, 4039, 3, 18, 7329, 13, 5, 18, 1231, 6861, 29

PROBLEM: ['M', 'W', '81', 'G', '3015', 'i', '7019', 'n', 'Q', '9433', '1581', 'd', 'U', '8775', 'x', 'I', 'H', '2261', '2667', '6227', '1047', '6503', 'k', 'L', '7373', '1275', '429', '9743', '5921', 'k', '951', 'N']

SOLUTION:
13, 23, 81, 7, 3015, 9, 7019, 14, 17, 9433, 1581, 4, 21, 8775, 24, 9, 8, 2261, 2667, 6227, 1047, 6503, 11, 12, 7373, 1275, 429, 9743, 5921, 11, 951, 14