#include <stdio.h>

int main()
{
	int S;
	char C;

	while (scanf("%d %c", &S, &C) != EOF)
	{
		int ret = 0;

		switch (C)
		{
			case 'R': ret = S; break;
			case 'B': ret = S; break;
			case 'K': ret = (S < 2 ? 1 : 4); break;
			case 'N': ret = (S < 3 ? 1 : 2); break;
		}

		printf("%d\n", ret);
	}

	return 0;
}