import java.util.Scanner;


public class Chessboard {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (sc.hasNext()) {
			int pocet = sc.nextInt();
			String fig = sc.next();
			
			
			if (fig.equals("K")) {
				
				if (pocet == 1) {
					System.out.println(1);
				} else {
					System.out.println(4);
				}
				
				
			}
			
			
			if (fig.equals("R") || fig.equals("B")) {
				
				System.out.println(pocet);
				
				
			}
			
			
			
			if (fig.equals("N")) {
				
				if (pocet <= 2) {
					System.out.println(1);
				} else {
					System.out.println(2);
				}
				
			}
		}

	}

}