public static String nuller(int a) {
		if (a >= 128)
			return "";
		if (a >= 64)
			return "0";
		if (a >= 32)
			return "00";
		if (a >= 16)
			return "000";
		if (a >= 8)
			return "0000";
		if (a >= 4)
			return "00000";
		if (a >= 2)
			return "000000";
		if (a >= 1)
			return "0000000";
		return "0000000";
		
	}