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  1. import java.util.*;
  2. import java.util.regex.*;
  3. import java.lang.*;
  4. import java.io.*;
  5.  
  6. class Ideone
  7. {
  8. 	public static void main (String[] args) throws java.lang.Exception
  9. 	{
  10. 		 String text = "0001113033AA55608981";
  11. 		 Matcher mr = Pattern.compile("^(0*\\w{4})(.*)(\\w{4})$").matcher(text);
  12. 		 text = mr.replaceFirst(m -> m.group(1) + "*".repeat(m.group(2).length()) + m.group(3));
  13. 		 System.out.println(text);
  14. 	}
  15. }
Success #stdin #stdout 0.16s 58228KB
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stdin
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Standard input is empty
stdout
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0001113*********8981
https://ideone.com/gTjIiN
language:
Java (HotSpot 12)
created:
44 days ago
visibility:
secret

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