In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting string. 'i' and 'j' will be non-negative, and will always have a value less than the length of A. 'i' will always be less than 'j'. Perform the operations in order, i.e., do not reverse first and then concatenate.

[Q]: 7, 9, ['w', 'L', '7649', 's', 'D', '45', 'L', 'O', 'H', '2781', '6883', 'h']
[A]: HOL


[Q]: 10, 17, ['H', '8993', 'l', 'W', 'T', '7135', 'A', '743', '7525', '1361', '9927', '3409', 'g', 'k', 'd', 'w', '7523', '1303']
[A]: 3257wdkg904372991631


[Q]: 8, 11, ['689', 'r', 'a', 'k', '4989', 'y', 'H', 'A', 'b', 'U', '121', '1221', 's', '5933', '6451', 'x', 'j', '2821', 'h', 'i', '1549', '2239', '1747', 'a', 'O', 'b', 'k', '4411']
[A]:
121UbA