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  1. import re
  2.  
  3. sentence = "blah blah blah jnfskjndflah"
  4. s = re.sub("(?<=[a-z]{2})lah", "", sentence)
  5. print(s)
Success #stdin #stdout 0.02s 9704KB
stdin
Standard input is empty
stdout
blah blah blah jnfskjndf