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.

Q: 4, 16, ['S', '5719', '173', 'P', 'a', '5791', 'e', '6279', 'q', '2585', '9533', 'r', '849', 'h', '3259', '3707', '4939', 'X', 'e']

A: 70739523h948r33595852q9726e1975aP
****
Q: 5, 7, ['1245', '6761', 'w', 'A', '2303', '1045', 'H', '6193', '6147', 'H', 'S', '305', '7895']

A: H54013032
****
Q: 5, 21, ['8153', 'B', 'm', 'E', 'i', '1741', '9641', '767', 'x', '6865', '8179', '7415', 'J', 'P', 'A', '3265', '9227', '9421', 'n', 'W', '1449']

A:
9441Wn124972295623APJ514797185686x76714691471i
****