players=input("Δωσε αριθμό παικτων 2-5 : ")
while not( 2 <= players <=5 ): # palyers >=2 and players<=5
    print "lauos"
    players=input("Δωσε αριθμό παικτων 2-5 : ")
else:
    print "ok"

print "Παιζουν ",players," paiktes"