Ack(2,2)=Ack(1,Ack(2,1))
    =Ack(1,Ack(1,Ack(2,0)))
    =Ack(1,Ack(1,Ack(1,1)))
    =Ack(1,Ack(1,Ack(0,Ack(1,0))))
    =Ack(1,Ack(1,Ack(0,Ack(0,1))))
    =Ack(1,Ack(1,Ack(0,2)))
    =Ack(1,Ack(1,3))
    =Ack(1,Ack(0,Ack(1,2)))
    =Ack(1,Ack(0,Ack(0,Ack(1,1))))
    =Ack(1,Ack(0,Ack(0,Ack(0,Ack(1,0)))))
    =Ack(1,Ack(0,Ack(0,Ack(0,Ack(0,1)))))
    =Ack(1,Ack(0,Ack(0,Ack(0,2))))
    =Ack(1,Ack(0,Ack(0,3)))
    =Ack(1,Ack(0,4))
    =Ack(1,5)
    =Ack(0,Ack(1,4))
    =Ack(0,Ack(0,Ack(1,3)))
    =Ack(0,Ack(0,Ack(0,Ack(1,2))))
    =Ack(0,Ack(0,Ack(0,Ack(0,Ack(1,1)))))
    =Ack(0,Ack(0,Ack(0,Ack(0,Ack(0,Ack(1,0))))))
    =Ack(0,Ack(0,Ack(0,Ack(0,Ack(0,Ack(0,1))))))
    =Ack(0,Ack(0,Ack(0,Ack(0,Ack(0,2)))))
    =Ack(0,Ack(0,Ack(0,Ack(0,3))))
    =Ack(0,Ack(0,Ack(0,4)))
    =Ack(0,Ack(0,5))
    =Ack(0,6)
    =7