instruction:
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.
question:
2, 4, ['B', '5601', 'v', '7431', 'z']
answer:
1347v1065


question:
19, 23, ['r', '521', '2357', 'j', 'R', 'a', '4853', 'q', '2383', 'i', '8071', '3715', '7533', '1407', 'e', '9495', 'k', '3789', 'P', 'c', '2565', 'q', '4565', 'P']
answer:
5654q5652cP


question:
1, 7, ['e', '6933', '9999', '3659', '1637', 'd', 'i']
answer:

id7361956399993396e