func setButtonStyle(_ button: UIButton, subject: String) {
    button.backgroundColor = UIColor.lightGray
    button.setTitle(subject, for: .normal)
    button.setTitleColor(UIColor.white, for: .normal)
    button.layer.cornerRadius = 3
    button.titleLabel?.sizeToFit()
    button.sizeToFit()
    button.frame.size = CGSize(width: 5, height: 20)
}