import java.util.Scanner;
public class Main{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int a = 0;
int b = 0;
int n;
for (int i = 0; i < 4; i++){
n = sc.nextInt();
a += n;
}
for (int i = 0; i < 4; i++){
n = sc.nextInt();
b += n;
}
System.out.println(Math.max(a, b));
}
}