import java.util.*;
import java.lang.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String line = "(rate:real;interest,principal:real)";
      	String pattern = "((?<=[\\(,;])[A-Za-z_]\\w*)";
 
      	// Create a Pattern object
      	Pattern r = Pattern.compile(pattern);
 
      	// Now create matcher object.
      	Matcher m = r.matcher(line);
 
      	while (m.find()) {
      		System.out.println(m.group(1));
      	}
	}
}

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