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.

[EX Q]: ['U', '1531', 't', '6929', 'P', '9619', 'G', 'g', '8511']
[EX A]: 21, 1531, 20, 6929, 16, 9619, 7, 7, 8511

[EX Q]: ['u', '6687', '2277', 'o', '7787', 'Z', 'b', 'I', '9983', 'N']
[EX A]: 21, 6687, 2277, 15, 7787, 26, 2, 9, 9983, 14

[EX Q]: ['x', '331', '1409', 'W', 'H', 'L', 'p', '8461', 'D', '5613', 'p', 'q', 'z', 'f', '5529', 'j', '2929', '425', '6941']
[EX A]:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
24, 331, 1409, 23, 8, 12, 16, 8461, 4, 5613, 16, 17, 26, 6, 5529, 10, 2929, 425, 6941

