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:
1, 2, ['1437', 'u']
answer:
u1437


question:
3, 15, ['2345', 'c', 'B', '2961', '189', '2409', '3715', '6803', '3947', 'u', '7099', 'w', 'f', 'M', 'Q', '7533', 'm']
answer:
QMfw7099u39476803371524091892961B


question:
16, 26, ['2339', '49', '2369', '7431', 'z', 's', 'b', '249', '1143', '8763', 'K', '551', 'Z', 'T', 'f', 'N', '8867', '2119', 'C', '3851', 'o', '9287', '6369', 'F', 'O', 'u', '7973']
answer:

uOF63699287o3851C21198867N