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:
3, 4, ['D', '7459', 'y', 'B', '1671', 'x', 'Y']
answer:
By


question:
11, 15, ['Y', 'L', 'I', 'u', 'z', '4077', 'K', '4679', 'l', '9269', '4071', '1789', 'b', '2139', 'b', '111', '6715', 'H', '3981']
answer:
b2139b17894071


question:
16, 18, ['S', 's', 'f', 'o', 't', '8053', '5079', 'D', '4441', '641', '9803', '5151', 'N', '7719', '7707', '6807', '5695', '3281', '4491']
answer:

328156956807