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]: 2, 8, ['O', '4833', '7055', '9891', '9117', '1571', 'S', 'Z', '7741', 'W', 't']
[EX A]: ZS17517119198955073384

[EX Q]: 16, 18, ['e', '1565', '1917', 'x', 'j', 'X', 'D', '1831', 'k', '6889', '159', 'Q', 'T', 'z', '9177', 'M', '2031', '527', 'y', '3189', 'y', '2953']
[EX A]:
7251302M