/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/* 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
	{
		Pattern p = Pattern.compile("(\\d+)\\.\\s([A-Z,\\s]+)");
		Matcher m = p.matcher("Answers 1. D 2. C 3. E 4. D 5. E 6. E 7. C");
		while(m.find())
		   System.out.println(m.group(0)+"_"+m.group(1)+"_"+m.group(2));
	}
}

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