public class Sentence
{  
   private String text;

   public Sentence (String aText)
	{
	   text = aText;
	}
		
   public  boolean isPalindrome (int start, int end)
   {
    char first, last;
   
    if (start >= end) 
      return true;
    first = Character.toLowerCase(text.charAt(start));
    last = Character.toLowerCase (text.charAt(end));
    if (Character.isLetter(first) && Character.isLetter(last))
	 {
	  if (first == last)
	  {
	    return isPalindrome(start + 1, end -1);
	  }
	  else
	    return false;
	}
	else if (!Character.isLetter(last))
	{
	  return isPalindrome (start, end-1);
	}
	else
	{ 
	  return isPalindrome (start+1, end);
	}
	} // end 2 argument isPalindrome
	
	
	public  boolean isPalindrome()
	{
	  return isPalindrome (0, text.length() - 1);
	}
		
 } // end class