import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int[] a = new int[3];
		int[] b = new int[3];
		for (int i=0; i<3; i++) {
			String s = sc.next();
			if (s.equals("?")) {
				a[i] = 1;
				b[i] = 4;
			}
			else {
				a[i] = Integer.parseInt(s);
				b[i] = Integer.parseInt(s);
			}
		}
		if (a[0]>a[1] && a[1]<a[2] || a[0]<a[1] && a[1]>a[2]) {System.out.print(1);}
		if (b[0]>b[1] && b[1]<b[2] || b[0]<b[1] && b[1]>b[2]) {System.out.print(4);}
	}
}