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]: 4, 16, ['S', '5719', '173', 'P', 'a', '5791', 'e', '6279', 'q', '2585', '9533', 'r', '849', 'h', '3259', '3707', '4939', 'X', 'e']
[EX A]: 70739523h948r33595852q9726e1975aP

[EX Q]: 3, 15, ['O', 'a', '6377', 'R', '1363', '8013', '1923', '4039', 'j', '1365', 'E', 'P', '7225', '7813', 'I']
[EX A]: I31875227PE5631j9304329131083631R7736

[EX Q]: 26, 26, ['5219', 'N', '8587', '527', 'h', 'K', 'u', '6283', '4823', 'p', 'n', '767', 'W', '1557', 'D', 'v', 'O', 'x', '31', '1481', 'Z', 'W', '7829', 'w', 'l', '5777']
[EX A]:
7775