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, 5, ['Y', 'O', 'Q', 'l', 'E']
[EX A]: ElQO

[EX Q]: 16, 17, ['E', '3657', 'O', 'B', 'V', '3761', 'v', '563', '1623', 'J', '5961', 'h', '5241', '9983', '3325', '1513', 'R']
[EX A]: R3151

[EX Q]: 2, 18, ['Z', '8929', 'D', 'Z', '8999', '1273', '8351', '9709', '2553', 'T', 'h', 'J', '5979', '3181', 'n', '789', 'C', '1685', '931']
[EX A]:
5861C987n18139795JhT35529079153837219998ZD9298