/* 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 str = "   " ;   // "CoDe" ;  // "bird" ;  // "" ;
 
		if ( str.isEmpty() ) { System.out.println( "ERROR - String has no characters." ); }
		else if ( str.isBlank() ) { System.out.println( "ERROR - String has only whitespace." ); }
		else if ( str.equals( "CoDe" ) ) { System.out.println( "Code received." ); }
		else { System.out.println( "ERROR - Incorrect entry." ); }
	}
}

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