#include <bits/stdc++.h>
using namespace std;
using LL = long long int;
#define incID(i, l, r) for(int i = (l)    ; i <  (r); ++i)
#define decID(i, l, r) for(int i = (r) - 1; i >= (l); --i)
#define incII(i, l, r) for(int i = (l)    ; i <= (r); ++i)
#define decII(i, l, r) for(int i = (r)    ; i >= (l); --i)
#define inc(i, n)  incID(i, 0, n)
#define dec(i, n)  decID(i, 0, n)
#define inc1(i, n) incII(i, 1, n)
#define dec1(i, n) decII(i, 1, n)
#define inID(v, l, r) ((l) <= (v) && (v) <  (r))
#define inII(v, l, r) ((l) <= (v) && (v) <= (r))
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define FI first
#define SE second
#define FR front()
#define BA back()
#define ALL(v) v.begin(), v.end()
#define RALL(v) v.rbegin(), v.rend()
auto setmin   = [](auto & a, auto b) { return (b <  a ? a = b, true : false); };
auto setmax   = [](auto & a, auto b) { return (b >  a ? a = b, true : false); };
auto setmineq = [](auto & a, auto b) { return (b <= a ? a = b, true : false); };
auto setmaxeq = [](auto & a, auto b) { return (b >= a ? a = b, true : false); };
#define SI(v) static_cast<int>(v.size())
#define RF(e, v) for(auto & e: v)
#define until(e) while(! (e))
#define if_not(e) if(! (e))
#define ef else if
#define UR assert(false)
#define IN(T, ...) T __VA_ARGS__; IN_(__VA_ARGS__);
void IN_() { };
template<typename T, typename ... U> void IN_(T & a, U & ... b) { cin >> a; IN_(b ...); };
template<typename T> void OUT(T && a) { cout << a << endl; }
template<typename T, typename ... U> void OUT(T && a, U && ... b) { cout << a << " "; OUT(b ...); }

// ---- ----

template<int D> struct StrInt {
	string s;
	StrInt() { }
	StrInt(string t) { init(t); }
	StrInt(LL     v) { init(v); }
	void init(string t) {
		bool flag = (t[0] == '-');
		if(flag) { t = t.substr(1); }
		string u(D - t.size(), '0');
		s = u + t;
		if(flag) { (*this) = -(*this); }
	}
	void init(LL v) {
		init(tostr(v));
	}
	string tostr(LL x) {
		string s;
		bool f = (x < 0);
		if(f) { x *= -1; }
		while(x) {
			s.PB('0' + x % 10);
			x /= 10;
		}
		if(f) { s.PB('-'); }
		reverse(ALL(s));
		return s;
	}
	StrInt & operator++() {
		dec(i, D) {
			s[i]++;
			if(s[i] > '9') { s[i] = '0'; } else { break; }
		}
		return (*this);
	}
	StrInt & operator--() {
		dec(i, D) {
			s[i]--;
			if(s[i] < '0') { s[i] = '9'; } else { break; }
		}
		return (*this);
	}
	StrInt operator+() const {
		return (*this);
	}
	StrInt operator-() const {
		StrInt y;
		y.init(s);
		--y;
		inc(i, D) { y.s[i] = '0' + ('9' - y.s[i]); }
		return y;
	}
	StrInt operator+(const StrInt & x) {
		StrInt y = x;
		dec(i, D) {
			y.s[i] += (s[i] - '0');
			if(y.s[i] > '9') {
				y.s[i] -= 10;
				if(i != 0) { y.s[i - 1]++; }
			}
		}
		return y;
	}
	StrInt operator-(const StrInt & x) {
		return (*this) + (-x);
	}
	StrInt operator*(const StrInt & x) {
		StrInt y, z = x;
		y.init("0");
		dec(i, D) {
			inc(j, s[i] - '0') { y = y + z; }
			StrInt v = z;
			inc(j, 9) { z = z + v; }
		}
		return y;
	}
	bool operator<(const StrInt & x) const {
		bool f1 = (  s[0] < '5');
		bool f2 = (x.s[0] < '5');
		
		if(f1 == f2) { return (s < x.s); }
		if(! f1 &&   f2) { return true; }
		if(  f1 && ! f2) { return false; }
	}
	bool operator==(const StrInt & x) const {
		return (s == x.s);
	}
	bool operator<=(const StrInt & x) const {
		return ((*this) == x || (*this) < x);
	}
	bool operator>(const StrInt & x) const {
		return ! ((*this) <= x);
	}
	bool operator>=(const StrInt & x) const {
		return ! ((*this) < x);
	}
};
template<int D> istream & operator>>(istream & is, StrInt<D> & x) {
	string s;
	is >> s;
	x.init(s);
	return is;
}
template<int D> ostream & operator<<(ostream & os, const StrInt<D> & x) {
	StrInt<D> s = x;
	if(s.s[0] >= '5') { s = -s; os << "-"; }
	int p = D - 1;
	inc(i, D) {
		if(s.s[i] != '0') { p = i; break; }
	}
	os << s.s.substr(p);
	return os;
}

int main() {
	IN(string, s, t);
	s = "0" + s + t + "+";
	
	vector<string> u;
	int p = 0;
	inc(i, SI(s)) {
		if(s[i] == '+' || s[i] == '-') {
			u.PB(s.substr(p, i - p));
			p = (s[i] == '+' ? i + 1 : i);
		}
	}
	StrInt<22> x(0), y;
	RF(e, u) { y.init(e); x = x + y; }
	OUT(x);
}