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:
19, 28, ['2809', '2943', '209', 'I', '4961', 'z', '6499', 'j', '8323', 'v', '6955', 'E', '2591', '5523', 'D', 'j', '3929', 'L', '501', 'Y', 'e', 'p', 'F', '1073', 'o', '3531', '9245', 'K']
answer:
K54291353o3701FpeY105


question:
8, 11, ['8881', '4663', '605', '7367', 'C', '3663', '3729', '7073', '4973', 'n', 'd', 'y', 'B']
answer:
dn37943707


question:
1, 21, ['6495', 'G', '7801', 'n', 'p', 'p', '1277', '9537', '1977', '2419', 'W', '1619', '3427', '851', 'r', '3591', '2061', 'N', '1081', '827', 'c', '1573', '2915', 'n', '2121', 'Z', '4463']
answer:

c7281801N16021953r15872439161W9142779173597721ppn1087G5946