#include<bits/stdc++.h>
using namespace std;
int main(){
	string s1,s2;
	cin>>s1>>s2;
	if(s1==s2){
		cout<<0;
	}else{
		cout<<s1[0]-s2[0];
	}
	
	
	return 0;
}

/**************************************************************
	Problem: 1848
	User: tangkaixuan
	Language: C++
	Result: Wrong Answer
****************************************************************/