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.

[EX Q]: 2, 12, ['9797', 'D', '41', 'Y', 's', 'u', 'X', 'Q', '2437', '7385', '7137', 'S', '6367', 'w', 'f', '7021', '7685', '7413']
[EX A]: S731758377342QXusY14D

[EX Q]: 9, 9, ['5503', 'f', 'g', 'B', '3003', '229', '4613', 'C', 'j', 'o']
[EX A]: j

[EX Q]: 1, 4, ['9623', 'B', 'C', '4427', '8677', '1491', '5983']
[EX A]:
7244CB3269