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]: 2, 11, ['6519', 'l', '6577', 'z', '4271', 'R', 'O', '7809', 'K', 'V', '4531']
[EX A]: 1354VK9087OR1724z7756l

[EX Q]: 4, 9, ['6451', '9261', 's', '5587', 'D', '7595', 'D', 'E', 's', '8841', 'Y']
[EX A]: sED5957D7855

[EX Q]: 6, 6, ['A', 'B', 'j', 'y', 'e', 'e', '9647', '9705', '3517', 'm', '3861', 'L', '4517', 'O', 'Q', 'l', 'I', 'F', '4887', '9559', 'L', 'D', '1409', 'o', 'W']
[EX A]:
e