int inPinA = 6;
int inPinB = 7;
int outPin = 13;
int buzzPin = 8;



void setup() {
  // put your setup code here, to run once:
  pinMode(inPinA, INPUT);
  pinMode(inPinB, INPUT);
  pinMode(outPin, OUTPUT);
  pinMode(buzzPin, OUTPUT);
  digitalWrite(outPin, LOW);
  digitalWrite(buzzPin, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  bool val1 = digitalRead(inPinA)==HIGH;
  bool val2 = digitalRead(inPinB)==HIGH;
  
if((val1 || val2) && !(val1 && val2) )
 digitalWrite(outPin,HIGH);
 digitalWrite(buzzPin, LOW);
 else if(val1 && val2)
 digitalWrite(outPin,HIGH);
 digitalWrite(buzzPin, HIGH);
 else
 digitalWrite(outPin, LOW);
 digitalWrite(buzzPin, LOW);

  }