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  1. import re
  2.  
  3. s = """vasya:true12
  4. gena:false9999
  5. petya:true888
  6. oleg:falsetrue
  7. fan:falsetrue909
  8. qqq:01234567890"""
  9.  
  10. print(re.sub(r"^.*:(.{0,7}|((?!.*(?!\d)\w)|(?!.*\d)).*)\r?$\n?", "", s, flags=re.M))
Success #stdin #stdout 0.02s 9600KB
comments (?)
stdin 
Standard input is empty
stdout 
gena:false9999
fan:falsetrue909
https://ideone.com/dHFc8g
language:
Python 3 (python  3.12)
created:
5 years ago
visibility:
public

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