how to fix error CS1525: Unexpected symbol `public' and 'private'

Here are the scripts:

PlayerMotor:

 public class PlayerMotor : MonoBehaviour 
 {
     private CharacterController controller;
     private Vector3 moveVector;
 
     private float speed = 10.0f;
     private float verticalVelocity = 0.0f;
     private float gravity = 5.0f;
         
     private float animationDuration = 2.0f;
 
     // Use this for initialization
     void Start () {
         controller = GetComponent<CharacterController> ();
     }
 
     // Update is called once per frame
     void Update () {
 
         if (Time.time < animationDuration) 
         {
             controller.Move (Vector3.forward * speed * Time.deltaTime);
             return;
         }
 
         moveVector = Vector3.zero;
 
         if (controller.isGrounded) 
         {
             verticalVelocity = -0.5f;
         } 
         else
         {
             verticalVelocity -= gravity * Time.deltaTime;
         }
 
         // X - Left and Right
         moveVector.x = Input.GetAxisRaw("Horizontal") * speed;
 
         // Y - Up and Down
         moveVector.y = verticalVelocity;
 
         // Z - Forward and Backward
         moveVector.z = speed;
 
         controller.Move (moveVector * Time.deltaTime);
 
              public void SetSpeed(int modifier)
         {
             speed = 5.0f + modifier;
         }
     }

Score:

 using UnityEngine;
 using System.Collections;
 
 public class Score : MonoBehaviour 
 {
     private float score = 0.0f;
 
     private int difficultyLevel = 1
     **ERROR --> **private int    maxDifficultyLevel = 10;
     private int scoreToNextLevel = 10;
     
 
     public Text scoreText;
 
 
     // Update is called once per frame
     void Update () {
 
         if (score >= scoreToNextLevel)
             LevelUp ();
 
         score += Time.deltaTime * difficultyLevel;
         scoreText.text = ((int)score).ToString ();
     }
 
     void LevelUp()
     {
         if (difficulityLevel == maxDifficultyLevel)
             return;
 
         scoreToNextLevel *= 2;
         difficultyLevel++;
 
         GetComponent<PlayerMotor> ().SetSpeed (difficultyLevel);
     }
 }