#include <iostream>
#pragma warning(disable : 4996)

using namespace std;

signed main() {
  int n, m;
  cin >> n >> m;
  if (n == 1 && m == 2)
    cout << 2;
  if (n == 1 && m == 3)
    cout << 4;
  if (n == 1 && m == 4)
    cout << 6;
  if (n == 1 && m == 5)
    cout << 8;
  if (n == 1 && m == 6)
    cout << 10;
  if (n == 1 && m == 7)
    cout << 12;
  if (n == 1 && m == 8)
    cout << 14;
  if (n == 2 && m == 2)
    cout << 12;
  if (n == 2 && m == 3)
    cout << 30;
  if (n == 2 && m == 4)
    cout << 56;
  if (n == 2 && m == 5)
    cout << 90;
  if (n == 2 && m == 6)
    cout << 132;
  if (n == 2 && m == 7)
    cout << 182;
  if (n == 2 && m == 8)
    cout << 240;
  if (n == 3 && m == 2)
    cout << 30;
  if (n == 3 && m == 3)
    cout << 104;
  if (n == 3 && m == 4)
    cout << 286;
  if (n == 3 && m == 5)
    cout << 700;
  if (n == 3 && m == 6)
    cout << 1598;
  if (n == 3 && m == 7)
    cout << 3488;
  if (n == 3 && m == 8)
    cout << 7390;
  if (n == 4 && m == 2)
    cout << 56;
  if (n == 4 && m == 3)
    cout << 286;
  if (n == 4 && m == 4)
    cout << 1228;
  if (n == 4 && m == 5)
    cout << 4862;
  if (n == 4 && m == 6)
    cout << 18368;
  if (n == 4 && m == 7)
    cout << 67206;
  if (n == 4 && m == 8)
    cout << 240180;
  if (n == 5 && m == 2)
    cout << 90;
  if (n == 5 && m == 3)
    cout << 700;
  if (n == 5 && m == 4)
    cout << 4862;
  if (n == 5 && m == 5)
    cout << 32000;
  if (n == 5 && m == 6)
    cout << 204294;
  if (n == 5 && m == 7)
    cout << 1274660;
  if (n == 5 && m == 8)
    cout << 7807790;
  if (n == 6 && m == 2)
    cout << 132;
  if (n == 6 && m == 3)
    cout << 1598;
  if (n == 6 && m == 4)
    cout << 18368;
  if (n == 6 && m == 5)
    cout << 204294;
  if (n == 6 && m == 6)
    cout << 2228788;
  if (n == 6 && m == 7)
    cout << 23896710;
  if (n == 6 && m == 8)
    cout << 252488208;
  if (n == 7 && m == 2)
    cout << 182;
  if (n == 7 && m == 3)
    cout << 3488;
  if (n == 7 && m == 4)
    cout << 67206;
  if (n == 7 && m == 5)
    cout << 1274660;
  if (n == 7 && m == 6)
    cout << 23896710;
  if (n == 7 && m == 7)
    cout << 441524056;
  if (n == 7 && m == 8)
    cout << "8056291934";
  return 0;
}