public String processEConfig(String config){
		if(config == null || config.equals("")) return null ;
		int scode = Integer.parseInt(config.substring(2)) ;
		int prefix = 0;
		char sl = config.charAt(1);
		if(sl == 'V') prefix = 1;
		else if(sl == 'F') prefix = 2 ;
		else if(sl == 'U') prefix = 3;
		else if(sl == 'G') prefix = 4;
		
		return (prefix*100 + scode)/500 +"" ;
	}