import java.util.Scanner;

public class Main{

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0; i < 3 ;i++) a[i] = sc.nextInt();
        System.out.print("#");
        for (int i = 0; i < 3 ;i++) {//将每个a[i]转为13进制
            System.out.print(get(a[i] / 13));
            System.out.print(get(a[i] % 13));
        }
        System.out.println();
    }

    private static char get(int n) {
        if (n <= 9) return (char)('0' + n);//[0,9]直接返回
        return (char)('A' + (n - 10));//转为对应的字母
    }
}