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, 18, ['R', '7241', 'A', 'z', '8115', '6251', 'F', '1405', 'N', '3567', '1525', 'a', '6057', 'E', '5637', '4969', '3499', '5489', 'Z', 'K', 'M', 'I', 'Z', 'j']
[EX A]: 9845994396947365E7506a52517653N5041F15265118zA

[EX Q]: 5, 7, ['2695', 'K', 'B', 'h', 'V', '6435', 'Q', '2881', '7385', '8941']
[EX A]: Q5346V

[EX Q]: 4, 15, ['X', 'J', 'D', '3683', '8915', 'v', '5627', 'm', 'w', '7221', 'E', 'C', 'm', '2905', 'q', '827', 'Y', 'm', 'p', '657', 'h', '7305', '5429', '4265', 'A', '7749', '1769']
[EX A]:
q5092mCE1227wm7265v51983863