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]: 2, 6, ['1467', 'm', '9771', '6533', 'm', 'x', 'c', 'd', '3139']
[A]: xm33561779m


[Q]: 5, 16, ['8475', 'y', 'z', 'M', '7495', 'p', '6073', '1545', '9065', '8957', 'z', 'Y', '863', '4153', '3381', '5513', 'K', 'H', '4083', '6175', 'H', '6463', 'G', '5217', 's', 'c']
[A]: 315518333514368Yz7598560954513706p5947


[Q]: 10, 20, ['g', 'R', '7229', '9947', 'P', '8527', 'Q', '1641', 'c', 'J', 'e', '9253', 'v', 'D', 'I', '2789', '8673', '2163', '2835', '6481', '7145', 'K', '2067', 'b']
[A]:
18465382361237689872IDv3529eJ