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:
1, 9, ['C', 'V', '9945', 'W', 'R', 't', '471', 'Y', 'F', '2445', 'd', 'R', 'l', 'f', '5041', 'm', '7347', 'j', '6257']
answer:
FY174tRW5499VC


question:
2, 3, ['2923', 'F', '4033', 'V']
answer:
3304F


question:
5, 14, ['2393', '8705', 'N', '8097', '9159', '9679', 'U', '5027', '2915', 'I', '651', '7077', 'v', '861', '9825', '4305', '4169', '4465']
answer:

168v7707156I51927205U97699519