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, 1, ['Q', '2357', '6479', '7105', 'M', 'x', '6281', '9331', 'z', 't', 'N', 'O', 'n', 'K', '9575', 'w', '657', '8531', '8837', 'p', '7781']
[EX A]: Q

[EX Q]: 9, 16, ['E', 'M', '361', '4657', '8215', '8495', '73', 'O', '1949', '8617', '7963', 'B', '4393', 'b', '5085', '1535', 'A', 't', '4831', 'v', '9665', 'Z', '7017', '4449', 'Z', 'd', 'Q', '3879', 'J', 'y']
[EX A]: 53515805b3934B369771689491

[EX Q]: 4, 14, ['4423', 'N', 'p', '5631', 'K', '3059', 'W', '1735', '5079', 'd', 's', '5121', 'c', 'l', '8551', 'l', 'J', '8595', '1807', '5977']
[EX A]:
lc1215sd97055371W9503K1365