/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
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 newstr = new StringBuilder()
                        .append(10)
                        .append(20)
                        .append("Good")
                        .append(30)
                        .append(40)
                        .append("morning")
                        .toString();
		System.out.println(newstr);
	}
}

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