int btnpin = 2;
int btnval;
int potpin = A0;
int potval;
int potmap;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(btnpin, INPUT_PULLUP);
  pinMode(potpin, INPUT);


}

void loop() {
  // put your main code here, to run repeatedly:
  btnval = digitalRead(btnpin);
  //Serial.print("BUTTON VAL:  ");
  //Serial.println(btnval);
  potval = analogRead(potpin);
  
  
  potmap = map(potval,0,1024,0,10);
  //Serial.print("POT VAL:  ");
  //Serial.println(potmap);

  if (btnval == 0 && potmap == 0){
    Serial.println("A");
  }
  if (btnval == 0 && potmap == 1){
    Serial.println("B");
  }
  if (btnval == 0 && potmap == 2){
    Serial.println("C");
  }
  if (btnval == 0 && potmap == 3){
    Serial.println("D");
  }
  if (btnval == 0 && potmap == 4){
    Serial.println("E");
  }
  if (btnval == 0 && potmap == 5){
    Serial.println("F");
  }
}