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, 4, ['j', '2349', 'V', '4879', '8473', 'X', 'C', '2769', 's', '6297', '7723', '6009', 'I', '6385', '9161', '9179', '9785', '4965', '4479', '7323', '4685', '1891']
[EX A]: 9784V9432j

[EX Q]: 1, 7, ['j', 'P', '5633', 'g', 'z', '3163', '8849', '1267', '1157', '6987', '9743']
[EX A]: 94883613zg3365Pj

[EX Q]: 4, 18, ['9179', '9443', 'W', 'v', 'c', 'J', 'S', 'E', '5899', 't', 'G', 'F', '4493', '7043', 'S', '4021', 'b', 'v', 'i', '4353', '1447', 'S']
[EX A]:
vb1204S34073944FGt9985ESJcv