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]: 3, 6, ['p', 'H', '2775', '2567', '7787', 'D', '3807', '4817', '5399']
[A]: D787776525772


[Q]: 7, 8, ['8275', 'o', 'f', '6403', '7399', 'M', 'E', '7879', 'e', 'L', 'F', '2019']
[A]: 9787E


[Q]: 1, 23, ['u', '2119', 'i', '1715', 'q', 'G', '1483', '9089', '3419', '9571', '9857', 'u', 't', '2645', 'F', '7165', 'k', 'w', '8895', '1813', '8623', '993', 'O', '1023', 'F', 'l']
[A]:
O399326831815988wk5617F5462tu75891759914398093841Gq5171i9112u