class C2:
	def x(): print self.account
	def z(self,data): self.acc = data
class C3:
	def w(self,data): self.acc += data
	def z(self,data): self.acc = data
class C1(C2,C3):
	def x(self,data): self.acc -= data
	def v(self, time): print "at " + time + " : " + self.name + " has " + str(self.acc)
I1 = C1()
I1.name = "Python"
I1.z(123)
I1.v("09/10/08")
I2 = C2()