#include <Arduino.h>

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  Serial.begin(9600);

  // Set all PORTB pins as output
  DDRB = 0xFF;

  // Set all PORTD pins as input with pull-up resistors
  DDRD = 0x00;
  PORTD = 0xFF;
}

void loop() {
  // Read the input from PORTD
  uint8_t portd_value = PIND;

  // Shift right by 2 bits
  portd_value = portd_value >> 2;

  // Print the value to the serial monitor
  Serial.println(portd_value);

  // Output the value to PORTB
  PORTB = portd_value;

  // Wait for a second before the next loop iteration
  delay(10);
}