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.

Q: 1, 2, ['A', '8103', '7829']

A: 3018A
****
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']

A: 9845994396947365E7506a52517653N5041F15265118zA
****
Q: 4, 13, ['v', '721', '1631', '5171', '8613', 'a', 'C', '4493', 'A', '5909', 'Z', 'u', 'X', '5569', '4777', '5135', '8257', '7001', 'R', 's']

A:
XuZ9095A3944Ca31681715
****