#include <iostream>

using namespace std;

int main()
{
	int a,b,c,d;

	cin >> a;
	cin >> b;
	cin >> c;
	cin >> d;

	if(a == c && b == d)
	{
		cout << "=" << endl;
		return 0;
	}
	else if(a<=d)
	{
		if(b>=c)
		{
			if(a<=c && b>=d)
			{
				cout << 2 << endl;
				return 0;
			}
			else if(a>=c && b<=d)
			{
				cout << 1 << endl;
				return 0;
			}
		}
	}
	cout << "?" << endl;
	return 0;
}