#include<bits/stdc++.h>
using namespace std;
string s1,s2;
char f='+';
int a[250],b[250],c[250];
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();i++){
        a[i]=s1[s1.size()-1-i]-48;
    }
    for(int i=0;i<s2.size();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]+=10;
        }
        c[i]=a[i]-b[i];
    }
    if(f=='-')
    cout<<f;
    for(int i=len-1;i>=0;i--){
        if(c[i]!=0){
            cout<<c[i];
        }
    }
}
/**************************************************************
	Problem: 1269
	User: luyanchen
	Language: C++
	Result: Wrong Answer
****************************************************************/