#include<bits/stdc++.h>
using namespace std;
string s1,s2;
int a[245],b[245],c[245],p;
int main () {
	char f='+';
	cin>>s1>>s2;
	if(s1.size()<s2.size()||s1.size()==s2.size()&&s2>s1){
		swap(s1,s2);
		f='-';
	}
	for(int i=0;i<s1.size();i++){
		a[s1.size()-1-i]=s1[i]-'0';
	}
	for(int i=0;i<s2.size();i++){
		b[s2.size()-1-i]=s2[i]-'0';
	}
	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];
	}
	if(f=='-'){
		cout<<f;
	}
	for(int i=len-1;i>=0;i--){
		if(c[i]!=0){
			p=i;
			break;
		}
	}
	for(int i=p;i>=0;i--){
		cout<<c[i];
	}
	return 0;
}