#include <iostream>
#include <vector>
using namespace std;

int main()
{
	int x, y;
	cin >> x >> y;
	vector<vector<int>> dp(9 - y, vector<int>(8));
	if (y == 8)
	{
		cout << '1';
	}
	else
	{
		for (int j = 0; j < 8; ++j)
		{
			dp[y - 1][j] = 0;
		}
		dp[y - 1][x - 1] = 1;
		for (int i = y; i < 8; ++i)
		{
			for (int j = 0; j < 8; ++j)
			{
				if (j = 0)
				{
					dp[i][j] = dp[i - 1][j + 1];
				}
				else if (j = 7)
				{
					dp[i][j] = dp[i - 1][j - 1];
				}
				else
				{
					dp[i][j] = dp[i - 1][j - 1] + dp[i - 1][j + 1];
				}
			}
		}
		int sum = 0;
		for (int i = 0; i < 8; ++i)
		{
			sum += dp[7][i];
		}
		cout << sum;
	}
}