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, 5, ['3001', '661', 'S', 'N', '7919']
[EX A]: 9197N

[EX Q]: 8, 12, ['K', 'x', 'a', 'A', '6203', '117', '1007', '6063', '569', '9809', '9097', 'w', '3939', 'l', 'V']
[EX A]: w790990899653606

[EX Q]: 15, 16, ['x', 'l', 'Y', '8529', '5849', 'e', '7577', 'R', 'F', '9789', '8253', '1047', 'B', 'a', '3353', '6127', 'q', '6853', 'M', '4823', 'g', 'J', 'c']
[EX A]:
72163533