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, 3, ['N', 'U', 'D', 'm', '9001', 'I', '2675', 'l', '2771', 'U', '1181', 'U']
[EX A]: DU

[EX Q]: 1, 30, ['u', '2967', '8693', '6963', 'w', 'A', '1211', '2737', '3565', 'i', '3755', 'N', 'y', '7541', '685', '1191', '1837', '7215', '7191', '515', 'm', 'b', 'm', 'E', 'j', '5337', '7119', '599', '5097', '3399']
[EX A]: 9933790599591177335jEmbm51519175127738119115861457yN5573i565373721121Aw369639687692u

[EX Q]: 16, 23, ['1223', '9147', '6929', 'V', '9891', '8549', '8401', '8609', '7731', 'P', '3977', '873', 'A', '9233', 'N', 'x', 'D', 'w', '9111', '1987', 'G', '5413', '3621', 'b', 'm', '6365', '5361', 'O', '7527']
[EX A]:
12633145G78911119wDx