How to bind label to first letter of StringProperty?

I have StringProperty that consists of two letters (example: 06) that are constantly changing. I have two labels, which I want to bind to each letter of StringProperty, like label1="0" and label2="6". Is there a way to bind label to specific letter of StringProperty?

Currently my code is:

@FXML
private Label hoursLabel1;

@FXML
private Label hoursLabel2;

private StringProperty hours;

 @FXML
    private void initialize() {
 hoursLabel1.textProperty().bind(hours);
 }