import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
	public static void main (String[] args) 
	{
	    int x; //описание переменных
	    boolean mult1, mult2;
	    System.out.printf("Enter x=\n");
	    Scanner sc = new Scanner(System.in);
	    x = sc.nextInt();
	    mult1 = (x % 3 == 0);
	    x=x/100+x/10%10+x%10;
	    mult2 = (x % 3 == 0);
	    if (mult1 == mult2) System.out.printf("not refuted"); //проверка признака
	        else System.out.println("refuted");
	}
}