static void Main(string[] args) { Student st1 = new Student("George", "Malandris", "4dd4d"); st1.print(); Student st2 = new Student("Panagiotis", "varamentis", "4dd4d46"); st2.print(); Student st3 = new Student("stavros", "", "4dd4d45"); st3.print(); Student st4 = new Student("Aggeliki", "Papantoniou", "d455a55555a"); st4.print(); Worker w1 = new Worker("George", "Malandris", 50, 8); w1.print(); Worker w2 = new Worker("Panagiotis", "varamentis", 150, 30); w2.print(); Worker w3 = new Worker("stavros", "", 1, 8); w3.print(); Worker w4 = new Worker("Aggeliki", "Papantoniou", 100, 0); w4.print(); }