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]: 20, 26, ['9693', 'i', '8753', 'f', '9131', 'v', '2831', '1541', 's', '8307', '373', 's', 'z', '4929', 'I', '741', 'K', '7767', '2557', 'f', '887', 'g', '779', 'k', '5967', '4947', '2373', '7251', '8841', '3277']
[EX A]: 74947695k977g788f

[EX Q]: 2, 16, ['6623', 'E', 'S', '8679', '7465', '2769', 'G', '9635', 'Z', 'Y', '6593', '9535', '5247', '2185', '7071', 'P', '7897', 'm']
[EX A]: P17075812742553593956YZ5369G967256479768SE

[EX Q]: 3, 17, ['P', '2385', 's', 'q', 'K', 'E', '2811', 'R', 'h', '9035', '8895', 'p', '1951', 'p', 'E', 'c', '8735', 'C', '9563', '5069']
[EX A]:
5378cEp1591p59885309hR1182EKqs