package codeup_100;
import java.util.Scanner;
public class codeup_65 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
int b = sc.nextInt();
int c = sc.nextInt();
if(a%2==0) {
System.out.println(a);
}
if(b%2==0) {
System.out.println(b);
}
if(c%2==0) {
System.out.println(c);
}
}
}