How Do I Fix Unexpected Char 0x201C? (Code Below)

 #pragma strict
 
     function Start () {
     
     }
     
     function Update () {
         var AT = gameObject.GetComponent(AnimateTexture); //Store AnimateTexture Script
         if(Input.GetKey(“a”)){ //Player moves left
             AT.rowNumber = 1; //Change to running animation
         } else if(Input.GetKey(“d”)){ //Player moves right
             AT.rowNumber = 1; //Change to running animation
         } else { //Player is not moving
             AT.rowNumber = 0; //Change to idle animation.
         }
     }