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]: 18, 20, ['1111', '8387', 'Q', 'O', 'A', 'E', '7233', 'o', '5603', 'H', '5793', 'k', '5603', 'B', 'F', 'e', 'Q', 'w', '9253', '6559']
[EX A]: 95563529w

[EX Q]: 5, 16, ['8475', 'y', 'z', 'M', '7495', 'p', '6073', '1545', '9065', '8957', 'z', 'Y', '863', '4153', '3381', '5513', 'K', 'H', '4083', '6175', 'H', '6463', 'G', '5217', 's', 'c']
[EX A]: 315518333514368Yz7598560954513706p5947

[EX Q]: 10, 30, ['7253', '3421', 'i', '6641', 'B', '6159', '7415', '1679', 'j', 'L', '8383', '9741', 'n', '2451', 'p', '6055', 'I', 'V', '4163', 'j', '7523', 'k', 'v', '639', 'p', 'x', 'A', '8343', '6433', 'L']
[EX A]:
L33463438Axp936vk3257j3614VI5506p1542n14793838L