import java.util.*;
import java.io.*;
public class Task1
{
public static void main(String[] args) throws IOException
{
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String line1 = reader.readLine();
String line2 = reader.readLine();
if (line1.length() < line2.length())
{
String tmp = line1;
line1 = line2;
line2 = tmp;
}
char[] first = line1.toCharArray();
char[] second = line2.toCharArray();
int[] a = new int[first.length];
for (int i = 0; i < first.length ;i++ )
{
a[i] = Integer.parseInt(String.valueOf(first[i]));
}
int[] b = new int[second.length];
for (int i= 0; i< second.length ;i++ )
{
b[i] = Integer.parseInt(String.valueOf(second[i]));
} // end of for
int[] result = new int[first.length];
/* for (int i = 1; i <= second.length ;i++ )
{
int r = a[a.length-i]+b[b.length-i];
if (r >= 10) {
r -= 10;
} // end of if
result[result.length-i] = r;
} // end of for
for (int i = 1;i <= a.length - b.length ;i++ )
{
int r = a[a.length-b.length-i];
result[result.length-b.length-i] = r;
} // end of for
System.out.println("");
print_array(result);
} */
public static void print_array(int[] a)
{
for (int i = 0;i < a.length ;i ++ )
{
if (a[i] != 0)
System.out.print(a[i]);
}
}
}