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]: 4, 19, ['I', 'h', 'D', 'd', 'e', 'X', 'h', '2821', 'y', '2537', '2345', 't', 'I', 'i', 'D', '543', '2469', 'j', 'V', 'U', '8523', '605', 'J', '6675', '8559', 'n']
[EX A]: Vj9642345DiIt54327352y1282hXed

[EX Q]: 1, 6, ['i', '8793', 'i', 'E', 'P', 'h', 'v', '4901', 'I', 'E', 'R', '35', '9175', 'G', 'C', '395', '7333', 'q']
[EX A]: hPEi3978i

[EX Q]: 3, 20, ['G', 'q', '9559', '5793', 'e', 'Q', 'e', '8047', '545', '7527', 'G', 'E', '7919', '5709', '6933', '4103', 'z', 'e', 'n', '5885', '8997', 'K', '881', '1215', '4029', 'Z', '8115', 'W', '867', '165']
[EX A]:
5885nez3014339690759197EG72575457408eQe39759559