import java.io.*;
 class  addd
{
	   public static void main(String[] args)  throws Exception 
	    {
          char a ,b ;
			  a=(char)System.in.read();
			   while (a==' ')
              { a=(char)System.in.read();
              }
			  b=(char)System.in.read();	
			   while (b==' ')
              { b=(char)System.in.read();
              }
			  System.out.println(a+b-96);
	     }
}