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, 4, ['o', '5393', 'p', 'h', '5617', 'F', 'I', 'a']
[A]: hp3935


[Q]: 17, 21, ['5503', '2979', '6307', '633', 'n', '9339', '5829', '5291', '8967', 'i', '9063', '975', 'G', '9187', '3227', 'A', '3487', '8187', 'H', '6097', 'H']
[A]: H7906H78187843


[Q]: 2, 6, ['r', '7597', '5869', '1973', '6467', '325', '3235', '2645', '9055', '7955']
[A]:
5237646379196857957