class Lang_opt(db.Model): id = db.Column(db.Integer, primary_key=True) options = db.Column(db.String(120), unique=True, nullable=False)
class Algorithm(db.Model): id = db.Column(db.Integer, primary_key=True) option = db.Column(db.String(20), unique=True, nullable=False)
class English(db.Model): id = db.Column(db.Integer, primary_key=True) sentence = db.Column(db.String(64), unique=True) answers = db.Column(db.String(120), nullable=False)