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: "a note on efficient computation of all abelian periods in a string"
  Abstract: We derive a simple efficient algorithm for Abelian periods knowing all Abelian squares in a string. An efficient algorithm for the latter problem was given by Cummings and Smyth in 1997. By the way we show an alternative algorithm for Abelian squares. We also obtain a linear time algorithm finding all `long' Abelian periods. The aim of the paper is a (new) reduction of the problem of all Abelian periods to that of (already solved) all Abelian squares which provides new insight into both connected problems.

Connected through hyperedge HE-1 (induced by source paper "string periods in the order preserving model"):
  with members:
    - "a note on easy and efficient computation of full abelian periods of a word"
    - "an encoding for order preserving matching"
    - "efficient algorithms for the order preserving pattern matching problem"
    - "algorithms for computing abelian periods of words"
    - "single and multiple consecutive permutation motif search"

Connected through hyperedge HE-2 (induced by source paper "computing abelian regularities on rle strings"):
  with members:
    - "online computation of abelian runs"
    - "a note on the longest common abelian factor problem"
    - "algorithms for longest common abelian factors"
    - "algorithms for computing abelian periods of words"

Connected through hyperedge HE-3 (induced by source paper "dyck words lattice paths and abelian borders"):
  with members:
    - "abelian bordered factors and periodicity"
    - "algorithms for computing abelian periods of words"
    - "algorithms for jumbled pattern matching in strings"

Connected through hyperedge HE-4 (induced by source paper "a note on easy and efficient computation of full abelian periods of a word"):
  with members:
    - "algorithms for computing abelian periods of words"
    - "identifying all abelian periods of a string in quadratic time and relevant problems"

Connected through hyperedge HE-5 (induced by source paper "abelian repetitions in sturmian words"):
  with members:
    - "identifying all abelian periods of a string in quadratic time and relevant problems"
    - "abelian primitive words"

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.DS(Data Structures and Algorithms)