In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.

[EX Q]: 6, 10, ['3799', '8635', '8411', 'Q', '4813', 'v', '9781', 'b', 'B', 'R', '5555', '2269', '7573', 'j', 'G', '6001', 'l', '209', '763', 'b', 'j', 'f', '9975', '2581']
[EX A]: RBb9781v

[EX Q]: 12, 14, ['8471', '6883', '8267', 'D', '385', 'Q', '6725', '1239', '2767', '7219', '4423', '5391', '8513', '5963']
[EX A]: 596385135391

[EX Q]: 9, 21, ['5739', '8137', 'J', '5841', '671', '3389', 'm', 'j', 'W', '4955', 'p', '5575', 'j', 'p', '2421', 'C', '4233', '8809', '4375', '5303', 'X', '357']
[EX A]:
X5303437588094233C2421pj5575p4955W