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

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
  //    Scanner sc = new Scanner (System.in);
        System.out.println("Hello world!");
   
     //   System.out.println("enter a num");
       int a = 7;
  
        switch (a)
   { 
            case 1:
          System.out.println("monday");
        break;
             
              case 2:
          System.out.println("tuesday");
        break;
           
          case 3:
          System.out.println("wedday");
         break;
             
              case 4:
          System.out.println("thursday");
         break;
             
              case 5:
          System.out.println("friday");
         break;
             
              case 6:
          System.out.println("saturday");
         break;
        
       default:
           
            System.out.println("no");
   }
        
    
    }
}