int main() 
{
  constexpr byte a {0x11};
  DDRB  = a;
  PORTB = a;
  
  constexpr byte b {0x55};
  DDRB = b;
  PINB = b;
  
  PINB  = 0x01;
  PORTB = 0xAA;
  while(1){}

}