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: 4, 20, ['p', '1643', 'O', '5867', 'Y', 'j', '2411', 'Z', '2563', '4757', 'B', 'b', '7489', '815', 'c', '6631', '8571', '6537', 'm', 'T']

A: Tm735617581366c5189847bB75743652Z1142jY7685
****
Q: 2, 17, ['781', '1949', '8017', 'I', 'F', 'k', 's', 'f', '9531', '3769', '8135', 'R', '7643', 'v', '6217', '4085', 'M', '1993']

A: M58047126v3467R531896731359fskFI71089491
****
Q: 9, 16, ['8767', '9753', 'M', '2307', 'F', 'c', '9273', 'J', 'v', 'j', '2043', '4695', '2105', 'z', '9875', '1805', 's', 'v', 'A', 'M', '3675', 'F', '2721', 'S', 'H', '3083', 's', 's', 'S']

A:
50815789z501259643402jv
****