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, 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: 20, 26, ['9693', 'i', '8753', 'f', '9131', 'v', '2831', '1541', 's', '8307', '373', 's', 'z', '4929', 'I', '741', 'K', '7767', '2557', 'f', '887', 'g', '779', 'k', '5967', '4947', '2373', '7251', '8841', '3277']

A: 74947695k977g788f
****
Q: 11, 12, ['x', 'm', 'v', 'w', '7665', 'a', 'u', 'Y', 'g', '427', 'W', '5279', '2221', '1049', 'S', '6953', '5783', '1273', 'p', 'm', '443', '1761', 'P', '4145', '8157', 'S', 'K', '5711']

A:
9725W
****