/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{

		String input = "Listen, Mr. Jones, calm down.";
		
		int countLetters = 0;
		for ( int i = 0 ; i < input.length() ; i++ )
		{
		    char c = input.charAt( i );
		    System.out.println( "c = " + c );
		    if ( ( c != ' ' ) && ( c != ',' ) && ( c != '.' ) )
		    {
		        countLetters++;
		    }
		}
		System.out.println( "countLetters = " + countLetters );

	}
}