#include<bits/stdc++.h>
using namespace std;
int a[250],b[250],c[250];
string s1,s2;
char f = '+';
int main()
{
    cin>>s1>>s2;
    if(s1.size()<s2.size() || s1.size() == s2.size() && s1 < s2)
    {
        f = '-';
        swap(s1,s2);
    }
    for(int i = 0;i<=s1.size()-1;i++)
    {
        a[i] = s1[s1.size()-1-i]-48;
    }
    for(int i = 0;i<=s2.size()-1;i++)
    {
        b[i] = s2[s2.size()-1-i]-48;
    }
    int len = s1.size();
    for(int i= 0;i<len;i++)
    {
        if(a[i]<b[i])
        {
            a[i+1] = a[i+1]-1;
            a[i] = a[i] +10;
        }
        c[i] = a[i] - b[i];
    }
    int p = 0;
    for(int i = len-1;i>=0;i--)
    {
        if(c[i]!=0)
        {
            p = i;
            break;
        }
    }
    if(f=='-')
    {
        cout<<f;
    }
    for(int i=p;i>=0;i--)
    {
        cout<<c[i];
    }
}
/**************************************************************
	Problem: 1269
	User: wuyichen
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2080 kb
****************************************************************/