#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>

using namespace std;
int main()
{
	ios_base::sync_with_stdio(false);
	char typ;
	int rozmer;
	int pocetTimov = 1;
	auto parket = new int[1000][1000];

	


	while (cin >> rozmer >> typ)
	{
		for (size_t i = 0; i < rozmer; i++)
		{
			for (size_t j = 0; j < rozmer; j++)
			{
				parket[i][j] = 0;
			}
		}


		int pocetTimov = 0;
		if (typ == 'K')
		{
			if (rozmer == 1)
			{
				pocetTimov = 1;
			}
			else 
			{
				pocetTimov = 4;
			}
		}
		else if (typ == 'N') 
		{
			if (rozmer < 3)
			{
				pocetTimov = 1;
			}
			else
			{
				pocetTimov = 2;
			}
		}
		else if (typ == 'B') 
		{
			pocetTimov = rozmer;
		
		} else // R
		{
			int i = 1;
			while (true)
			{
				if (rozmer > i) 
				{
					i *= 2;
				}
				if (i >= rozmer)
				{
					break;
				}
			}
			pocetTimov = i;
		}

		cout << pocetTimov << "\n";
	}
	return 0;
}