import java.util.Scanner;

public class LifePathNumber {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        String dateLine = input.next();
        input.close();

        int add = Integer.parseInt(dateLine);
        if (!isDateCorrect(dateLine)) {
            System.out.print(dateLine + " is wrong date.");
        } else {
            do {
                add = addAllNums(add + "");
            } while (add > 9);
            System.out.print(dateLine + " -> " + add);
        }
    }

    public static boolean isDateCorrect(String dateLine) {
        // 套用第1題做修改
        // ...
        // 記得寫return!!
    }

    public static int addAllNums(String stringNum) {
        // 套用第2題做修改
        // ...
        // 記得寫return!!
    }

}