#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC target("sse4")
using namespace std;
template <class T>
bool ckmin(T& a, const T& b) {
  return b < a ? a = b, 1 : 0;
}
template <class T>
bool ckmax(T& a, const T& b) {
  return a < b ? a = b, 1 : 0;
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const long double pii = 3.14159265359;
const int MOD = 1000000007;
const char nl = '\n';
const int MX = 200001;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int N, M;
  cin >> N >> M;
  vector<long long> fib;
  fib.push_back(1), fib.push_back(1);
  for (int x = 0; x < (max(N, M) + 1); x++) {
    fib.push_back((fib[(int)(fib).size() - 1] + fib[(int)(fib).size() - 2]) %
                  MOD);
  }
  cout << (2 * (fib[N] + fib[M] - 1)) % MOD << nl;
  return 0;
}
