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]: 1, 13, ['497', 'v', '7469', 'c', '8913', '533', 'P', '3051', '2237', 'R', '9609', 'J', 'R', 'x', '5787', '2203', '5943', '6847', '8989', 'A', '5227', 'O', 'M', 'n', '4993']
[EX A]: RJ9069R73221503P3353198c9647v794

[EX Q]: 5, 12, ['t', '4541', 'z', 'K', 'b', 'E', '3395', 'z', '4511', 'F', '7085', '3753', 'n', 'W', 'J']
[EX A]: 35735807F1154z5933Eb

[EX Q]: 26, 26, ['t', 'M', 'b', '7513', '7443', 'H', '6137', '5405', '6785', '455', 'v', '5081', 'C', 'W', '5635', 'C', '8087', '4203', 'M', 'M', '6463', 'o', 'G', '5457', 'e', 'R', '8055']
[EX A]:
R