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  1. import re
  2.  
  3. print(max((len(s) for s in re.findall(r"X(?:YZX)*(?:YZ?)?", input())), default=0))
Success #stdin #stdout 0.03s 9496KB
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https://ideone.com/9Z25K1
language:
Python 3 (python  3.12)
created:
5 years ago
visibility:
public

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