URI_2987.java

import java.io.IOException;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) throws IOException {
		
		String letra;
		
		Scanner sc = new Scanner(System.in);
		
		letra = sc.next();
		
		switch (letra) {
		case "A":
			System.out.println("1");
			break;
		case "B":
			System.out.println("2");
			break;
		case "C":
			System.out.println("3");
			break;
		case "D":
			System.out.println("4");
			break;
		case "E":
			System.out.println("5");
			break;
		case "F":
			System.out.println("6");
			break;
		case "G":
			System.out.println("7");
			break;
		case "H":
			System.out.println("8");
			break;
		case "I":
			System.out.println("9");
			break;
		case "J":
			System.out.println("10");
			break;
		case "K":
			System.out.println("11");
			break;
		case "L":
			System.out.println("12");
			break;
		case "M":
			System.out.println("13");
			break;
		case "N":
			System.out.println("14");
			break;
		case "O":
			System.out.println("15");
			break;
		case "P":
			System.out.println("16");
			break;
		case "Q":
			System.out.println("17");
			break;
		case "R":
			System.out.println("18");
			break;
		case "S":
			System.out.println("19");
			break;
		case "T":
			System.out.println("20");
			break;
		case "U":
			System.out.println("21");
			break;
		case "V":
			System.out.println("22");
			break;
		case "W":
			System.out.println("23");
			break;
		case "X":
			System.out.println("24");
			break;
		case "Y":
			System.out.println("25");
			break;
		case "Z":
			System.out.println("26");
			break;
		default:
			break;
		}
		
	}

}