private boolean isExistSpecialInv(String playerName, String specialInventoryName) throws Exception{
		String []list = getListSpecialInventory(getInventoryFile(playerName));
		boolean isMatched = false;
		for(String name : list){
			if(name.equals(specialInventoryName)){
				isMatched = true;
				break;
			}
		}
		return isMatched;
	}