/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* 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 name = "KH1";
    	if(name.matches("[K][H][1-9][0-9]?")){
	        System.out.println("VALID NAME");
	    }
	    else{
        	System.out.println("INVALID NAME");
    	}
	}
}

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