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:
8, 8, ['n', '9001', 't', 'e', 'W', '2287', 'f', '2735', 'z', '3065', 'J', '5609', 'e', 's', 'F']
answer:
5372


question:
7, 8, ['k', '59', 'Q', 'b', 'N', '5153', 'm', 's', '1703', 'i', 'E', 'x', '4727', '9723', '9305', '8843', '5295', '4281', '555']
answer:
sm


question:
15, 26, ['a', 'r', '3337', 'r', '5137', 'S', '9959', '2629', 'k', '9203', 'Z', 'x', '333', 'd', 'u', '1547', 'j', '6061', 'y', '3591', '9229', '443', '6067', '7155', 'Y', '3927']
answer:

7293Y5517760634492291953y1606j7451u