void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(Serial.available() > 0)
  {
    char val = Serial.read();
    Serial.print(val);
  }
  // char val = Serial.read();
  // Serial.print(val);
}