const int button = 2;
const int button2 = 3;

const int led = 9;  
 

int buttonState = 0; 
int buttonState2 = 0; 


void setup() {
  Serial.begin(9600);
 
  pinMode(led, OUTPUT);
  pinMode(button, INPUT);
  pinMode(button2, INPUT);
}


void loop() {
buttonState = digitalRead(button);
buttonState2 = digitalRead(button2); 

 
 if ( buttonState == HIGH) {

  Serial.println("A");
  }

  if ( buttonState2 == HIGH) {

  Serial.println("B");
  }
 
}