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  1. import re
  2. s = "aba\naaa\naba\naaa\naba"
  3. print( "\n".join([st for st in s.splitlines() if 'b' not in st]).replace('\n','\\n') )
  4. print("---")
  5. print( re.sub(r'^[^b\r\n]*b.*[\r\n]*', '', s, flags=re.M).strip().replace('\n','\\n') )
  6.  
Success #stdin #stdout 0.02s 27712KB
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stdin
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Standard input is empty
stdout
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aaa\naaa
---
aaa\naaa
https://ideone.com/NV9kpa
language:
Python 3 (python  3.12)
created:
6 years ago
visibility:
secret

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