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]: 8, 9, ['2123', 'O', '2505', 'd', '5435', '2145', '8281', 'b', 'v', '6485', '2349', '8739', '8459', 'O', 'h', '8279', 'L', '8345', 't', 'T', '5075', '7295', 'X']
[EX A]: vb

[EX Q]: 3, 4, ['435', 'K', '8051', '7159']
[EX A]: 95171508

[EX Q]: 12, 14, ['W', 'H', 'w', '139', 'G', 'A', '4019', '6721', '1361', 'k', '9883', '9237', 'P', '5563', '7383', 'N']
[EX A]:
3655P7329