class ControlledInput extends React.Component {
      constructor(props) {
        super(props);
        this.state = {
          input: ''
        };
    // change code below this line
    this.handleChange = this.handleChange.bind(this);
    // change code above this line
  }
  // change code below this line
  handleChange(event){
        this.setState({input: event.target.value});
  }
  // change code above this line
  render() {
        return (
          <div>
            { /* change code below this line */}
          <input onChange = {this.handleChange} type="text" name="input" value = {this.state.input} />
        { /* change code above this line */}
        <h4>Controlled Input:</h4>
        <p>{this.state.input}</p>
      </div>
    );
  }
}