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, 4, ['w', '3895', '4989', '7875', 'u']
[EX A]: 5787

[EX Q]: 6, 7, ['J', '701', 'm', '8837', 'b', 'd', '5911', 'y', '8031']
[EX A]: 1195d

[EX Q]: 1, 2, ['R', 'q', '4003', '3525', 'A', '6479', '8495', '617', '5381', 'a', 'A', '4951', 'R', 'Z', 'O', '9621', 'W', 'M']
[EX A]:
qR