#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize(2)//手动开o2优化oj不可用
int main()
{
	char flag = '+';
	string s1,s2;
	int a[10001],b[10001],c[10001] = {0};
	getline (cin,s1);
	getline (cin,s2);
	if(s1.size() < s2.size() || s1.size() == s2.size() && s1 < s2)
	{
		swap(s1,s2);
		flag = '-';
	}
	for(int i = 0;i <= s2.size();i++)
	{
		b[i] = s2[s2.size() - i - 1];
	}
	for(int i = 0;i <= s1.size();i++)
	{
		a[i] = s1[s1.size() - i - 1];
	}
	for(int i = 1;i <= s1.size();i++)
	{
		if(a[i] < b[i])
		{
			a[i] += 10;
			a[i + 1] --;
		}
		c[i] = a[i] - b[i];
	}
	int w = 0;
	for(int i = s1.size() - 1;i >= 0;i--)
	{
		if(c[i] != 0)
		{
			w = i;
			break;
		}
	}
	if(flag == '-')
	{
		cout << flag;
	}
	for(int i = w;i >= 0;i--)
	{
		cout << c[i] ;
	}
	return 0;
}