human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "configen a tool for managing configuration options"
  Abstract: A good way to build secure systems is the top-down approach, where each step reﬁnes the softwaretowards the ﬁnal implementation. The result is well-integrated, but quite monolithic. Consequently,further extensions often lead to an overuse of preprocessor conditionals and some code duplication. It isthen important to refactor and modularize the code, with the goal of increasing maintainability and codereuse.We are trying to apply this process to the implementation of the OASIS [9] kernel, an execution sup-port for hard real-time safety critical applications. Modularizing this software has speciﬁc requirements.First, the conﬁguration has to be chosen at compile-time (in particular, qualiﬁcation for use in safety-critical environments requires that no dead code remains in the system). Second, modularity should notimpact the degree of performance, in terms of execution time and memory footprint (for instance, mod-ularity should not imply new indirections, like C++ virtual method tables). Thus, the tool should allowthe static selection of a subset of the code in order to implement a speciﬁc behavior.C

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.SE(Software Engineering)