private String romC(int c) {
    	switch (c) {
    	case 1: return "C";
    	case 2: return "CC";
    	case 3: return "CCC";
    	case 4: return "CD";
    	case 5: return "D";
    	case 6: return "DC";
    	case 7: return "DCC";
    	case 8: return "DCCC";
    	case 9: return "CM";
    	default:return "";
    	}
    }