import java.io.*;
import java.util.*;
 
class GradeCalculator 
{
	public static void main(String[] args) throws IOException
	{
		
		String course[] = new String[]{"MIS650","MIS670","MIS692","MIS700","MIS800","MIS540"};
		Hashtable ht = new Hashtable();
 
		ht.put("A",new Integer(4));
		ht.put("B",new Integer(4));
		ht.put("B+",new Integer(3));
		ht.put("C",new Integer(3));
		ht.put("D",new Integer(0));
		ht.put("F",new Integer(0));
 
		System.out.println("Please enter your grades for respective courses - ");
 
		String temp;
		int credits = 0;
 
		BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
 
		for (int i=0;i<course.length ;i++ )
		{
			System.out.print(course[i]+" :");
			temp = buf.readLine();
			
			try{
				credits+= ((Integer)ht.get(temp)).intValue();
			}catch(NullPointerException ne){
				
				System.out.println("Please fill in correct grades");
				i--;
			}
		}
		System.out.println("Total credits = "+credits);
	}
}