int m, n, c;
Scanner s = new Scanner(System.in);
m = s.nextInt();
n = s.nextInt();
c = s.nextInt();
if(m == n) {
System.out.println(""+m + n);
} if (m == c)
{
System.out.println(""+m + c);
}
if(n == c) {
System.out.println(""+n + c);
}
if((m == n) && (n == c)) {
System.out.println(""+m + n + c);
}
else{
package en.codegym.task.pro.task03.task0305;
import java.util.Scanner;
/*
Three numbers
*/
public class Solution {
public static void main(String[] args) {
//write your code here
int m, n, c;
Scanner s = new Scanner(System.in);
m = s.nextInt();
n = s.nextInt();
c = s.nextInt();
if(m == n) {
System.out.println(""+m + n);
} if (m == c)
{
System.out.println(""+m + c);
}
if(n == c) {
System.out.println(""+n + c);
}
if((m == n) && (n == c)) {
System.out.println(""+m + n + c);
}
else{
}
}
}