#include <iostream>
using namespace std;
using lint = long long;


constexpr unsigned md = 1000000007;
int main() {
    long long A, B;
    cin >> A >> B;
    A %= (md * 2);
    B %= (md * 2);
    unsigned long long ret = 0;
    for (int sum = -A; sum <= A; sum++) {
        if (sum & 1) {
            ret += (B + 1) / 2 * 2;
        } else {
            ret += 1 + B / 2 * 2;
        }
    }
    cout << ret % md << '\n';
}