#include <bits/stdc++.h>

using namespace std;
const int N = 2010;

int x, flag = 1, num, n1, n2, maxx1, maxx2, a1[N], b1[N], a2[N], b2[N], ans[N];
string s1, s2;

int main() {
	getline(cin, s1);
	getline(cin, s2);
	s1.erase(s1.size() - 2, 2);
	s2.erase(s2.size() - 2, 2);
	for (int i = 0; i < s1.size(); i++) {
		if (s1[i] >= '0' && s1[i] <= '9') num = num * 10 + s1[i] - '0';
		else if (s1[i] == '-') flag = -1;
		else if (s1[i] == ' ') {
			if (++n1 % 2 == 1) a1[(n1 + 1) / 2] = flag * num;
			else b1[n1 / 2] = flag * num;
			num = 0;
			flag = 1;
		}
	}
	n1 /= 2;
	num = 0;
	flag = 1;
	for (int i = 1; i <= n1; i++) maxx1 = max(maxx1, a1[i]);
	for (int i = 0; i < s2.size(); i++) {
		if (s2[i] >= '0' && s2[i] <= '9') num = num * 10 + s2[i] - '0';
		else if (s2[i] == '-') flag = -1;
		else if (s2[i] == ' ') {
			if (++n2 % 2 == 1) a2[(n2 + 1) / 2] = flag * num;
			else b2[n2 / 2] = flag * num;
			num = 0;
			flag = 1; 
		}
	}
	n2 /= 2;
	for (int i = 1; i <= n2; i++) maxx2 = max(maxx2, a2[i]);
	for (int i = 1; i <= n1; i++) {
		for (int j = 1; j <= n2; j++) {
			ans[a1[i] + a2[j]] += b1[i] * b2[j];
		}
	}
	for (int i = maxx1 + maxx2; i >= 0; i--) {
		if (ans[i] == 0) continue;
		if (i == maxx1 + maxx2) {
			if (i == 0) cout << ans[i] << endl;
			else if (ans[i] == 1) cout << "x^" << i;
			else if (ans[i] == -1) cout << "-x^" << i;
			else cout << ans[i] << "x^" << i;
		} else if (i == 0) {
			if (ans[i] > 0) cout << '+' << ans[i] << endl;
			else cout << ans[i] << endl;
		} else {
			if (ans[i] == 1) cout << "+x^" << i;
			else if (ans[i] == -1) cout << "-x^" << i;
			else {
				if (ans[i] > 0) cout << '+' << ans[i] << "x^" << i;
				else cout << ans[i] << "x^" << i;
			}
		}
	}
	return 0;
}