**εσω ‘**eso’ : interior
έξω ‘ekso’ : exterior
https://www.google.com/search?q=Giorgio+Ceretti&client=safari&rls=en&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjl7NCXyPr9AhXopIkEHTfeCKwQ_AUoAXoECAEQAw&biw=1271&bih=806&dpr=2#imgrc=91JnY8ks5qy-sM
