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]: 1, 3, ['D', 'a', '1119', 'R', 'b', 'N', 'a', 'n', '4229']
[EX A]: 9111aD

[EX Q]: 27, 30, ['5597', 'd', 'R', '9463', '5187', '3625', 'x', 'c', '4851', '435', '5719', 's', '2797', '1659', '2379', 's', '8761', 'F', '5895', '4479', 'j', '6487', 'U', 'I', 'p', 'P', '1493', '7893', 'w', 'C']
[EX A]: Cw39873941

[EX Q]: 3, 18, ['1565', '6551', 'm', '4347', 'Z', 'W', '163', '9213', 'H', 'a', 'I', 'N', 'A', '2641', '5817', '2535', '6869', '9395', '8149', '917', '6607', 'y']
[EX A]:
59399686535271851462ANIaH3129361WZ7434m