include <bits/stdc++.h>

using namespace std; int fector(string s1, string s2); //Written by Master

int main() {

string s1, s2;
cin >> s1 >> s2;
if (s1 == s2)
{
	cout << 0;
}
else
{
	cout << fector(s1, s2);
}
return 0;

}

// jon jdnckzulwogzjgqgaejmxzshuzmnkqkqoxpwmyvwolykkvnrcudylnpwsjamwrsyqmbqudftjnuzbdvxauyarhglgtroxaz

int fector(string s1, string s2) {

int length = min(s1.length(), s2.length());
int i = 0;
for (; i < length; i++)
{
	if (s1[i] > s2[i])
	{
		if (s1 > s2)
		{
			return s1[i] - s2[i];
		}
		else
		{
			return s2[i] - s1[i];
		}
	}
	else if(s1[i]<s2[i])
	{
		if (s1 > s2)
		{
			return s2[i] - s1[i];
		}
		else
		{
			return s1[i] - s2[i];
		}
	}
}
return 0;

}