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:
9, 10, ['l', '9027', 'D', 'T', '6001', '7127', '2551', '3093', 'i', '3453']
answer:
3543i


question:
2, 7, ['9065', 'Q', 'L', 'U', '6289', '1915', '1747', 'a', 'N', '9259', '4713', '7959']
answer:
747151919826ULQ


question:
5, 7, ['8981', '9765', '1035', '8799', 'F', 't', 'X', '2177', 'g', '1017', '2021', '3919', '8569', '6245', 'L', 'Z', 'J', 'v', 'G']
answer:

XtF