instruction:
In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.
question:
6, 15, ['7969', 'z', '7061', 'J', 'T', '7917', '7225', '7907', '8333', 'U', 'w', 'Y', '4729', '2461', 'X', 'k']
answer:
X24614729YwU8333790772257917


question:
8, 13, ['s', '8529', 'p', 'm', '7059', 'j', 'C', '2863', '1513', '7099', 't', 'f', 'D', '6475']
answer:
Dft709915132863


question:
12, 19, ['1013', '1603', '1439', '8689', 'k', '9721', '4587', '3287', 'b', 'Y', '445', 'r', 'm', '1503', 'f', '5035', 'C', '8025', 'b', '7853', '8357', 'u', 'F']
answer:

b8025C5035f1503mr