import java.util.Scanner;
import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
        while (sc.hasNextLine()){
            String s = sc.nextLine();
            String[] s1 = s.split(" ");
            Integer result  = 0 ;
            for (String string : s1) {
                result+= getString(string);

            }
            System.out.println(getString(String.valueOf(result)));
        }
    }

    private static Integer getString(String s) {
        char[] charArray = s.toCharArray();
        //反转这个数组 栈,先进后出
        Stack stack =  new Stack();
        for (char c : charArray) {
            stack.push(c);
        }
        //取出来,如果开头是以0开始的则不加入
        
        StringBuilder sb = new StringBuilder();
        while (!stack.isEmpty()) {
            Object pop = stack.pop();

            if(i==0&&(char)pop=='0'){
                continue;
            }
            sb.append((char) pop);
          
        }
        String string = sb.toString();
        return Integer.valueOf(string);
    }
}