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]: 16, 16, ['7539', 'A', '8589', 'T', 'Q', 'u', 'z', 'A', '9751', '2913', '7453', '5649', 'Q', 'H', 'Z', 'O', 'v', 'V']
[EX A]: O

[EX Q]: 7, 8, ['1601', 'M', '4289', 'n', 'r', '8973', 'F', 'Y', 'v', '3357']
[EX A]: YF

[EX Q]: 3, 12, ['3883', '5395', 'u', 'I', '3385', 'p', '8029', '5463', 'v', 'd', '1157', '9797', 'h']
[EX A]:
79797511dv36459208p5833Iu