Access a script and all of its functions and values on the same gameObject from another script.

There are two gameObjects in the game: Player1 and Player2. They both share a script InputReader and a script DoSomething.

 public class InputReader : MonoBehaviour{
 
         //properties
         public GameObject yourObj;
         public bool inputIsReceived;
         public bool hasScriptAttached;
         public bool willReceiveJoystick1Input;
         public bool willReceiveJoystick2Input;
         
         /*public GetInput(){
             inputIsReceived = false;
         }*/
         
         public void CheckIfScriptIsAssigned(){
         //Checks the object name and assigns proper Input
         //Player1
             if(gameObject.name == "Player1"){willReceiveJoystick1Input = true;
                     Debug.Log("Will receive Joystick 1 Input");
                 }
         //Player2
             if(gameObject.name == "Player2"){willReceiveJoystick2Input = true;
                     Debug.Log("Will receive Joystick 2 Input");
                 }
         }
         
         public void CheckInput (){
         if(willReceiveJoystick1Input){
             if(Input.GetKeyDown(KeyCode.A)){
                     Debug.Log ("Input player1 received");
                 }
             }
             
         if(willReceiveJoystick2Input){
             if(Input.GetKeyDown(KeyCode.B)){
                     Debug.Log ("Input player2 received");
                 }
                 }
         }
         
     
     
     //public aGetInput x = new aGetInput();
     
     void Start (){
     //CheckIfScriptIsAssigned();
     }
     
     void Update (){
     //CheckInput();
         }
     }

What do I write in DoSomething script, so I could use any function from InputReader script at any time? Like x.CheckInput() in update and x.CheckIfScriptIsAssigned() in start. Really at a loss here ._.