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]: 3, 6, ['z', 'b', '2697', 'W', '1449', 'x', '5327']
[EX A]: x9441W7962

[EX Q]: 6, 9, ['V', 'Y', 'm', '235', 'K', '3381', 'h', 'T', '1455', 'F', '1385']
[EX A]: 5541Th1833

[EX Q]: 13, 21, ['3547', 'z', '9695', 'D', 'i', 'Q', '1503', 'I', 'Q', '6651', '6775', '6501', '697', '7579', 'X', '9595', 'b', 'Z', 'I', 'a', '3161']
[EX A]:
1613aIZb5959X9757796