20. 参考文献
・Duval, Jean-Pierre (1983), "Factorizing words over an ordered alphabet", Journal of Algorithms 4 (4)
・Apostolico, A., and Crochemore, M., Optimal canonization of all substrings of a string, Information
and Computation 95, 1 (1991): 76--95.
・Maxim A. Babenko, Pawel Gawrychowski, Tomasz Kociumaka, Tatiana A. Starikovskaya:
Computing Minimal and Maximal Suffixes of a Substring Revisited. CPM 2014: 30--39
・https://twitter.com/climpet/status/598440489935769601
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