import sys
sys.setrecursionlimit(5000000)
def Ack(M, N):
if (not M):
return( N + 1 )
if (not N):
return( Ack(M-1, 1) )
return( Ack(M-1, Ack(M, N-1)) )
def main():
NUM = 9
sys.setrecursionlimit(10000)
Ack(3, NUM)
main()