import java.util.Scanner;

public class Main{
   public static void main(String[] args) {
	 Scanner s = new Scanner(System.in) ;
	    while(s.hasNext()){
	    	long n = s.nextLong() ;
	    	
	    	System.out.println(Long.toOctalString(n));
	    }
   }  
}

/**************************************************************
	Problem: 2142
	User: admin
	Language: Java
	Result: Accepted
	Time:1026 ms
	Memory:39932 kb
****************************************************************/