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, 14, ['Y', '3111', 'M', 'N', 'l', '721', 'j', '997', 'e', '353', 'd', '167', '5485', 'C', '745', 'x', 'k', '7269', '5835', 'F', 'D', 'Y', 'a', '117']
[EX A]: C5845761d353e799j127lN

[EX Q]: 1, 6, ['7675', '2039', 'u', 'w', '8039', 'e', 'q']
[EX A]: e9308wu93025767

[EX Q]: 1, 7, ['6563', 'a', 'y', '491', '8249', 'R', 'i']
[EX A]:
iR9428194ya3656