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: 3, 4, ['6865', 'A', 's', 'o', '1989', 'i', '613', 'S', 's']

A: os
****
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: 5, 7, ['v', '7739', '9915', 'o', '7233', 'o', '6099', 'C', 'W', '43', 'y', '6815', '7823', '3199', 'x', 'W', 'W', 'Y', '3309', 'M', 'P', 'A', '8509', '3161', '4753']

A:
9906o3327
****