import sys
import pickle
from pickletools import dis
if len(sys.argv) > 1:
    set=dict.fromkeys
class C:
    pass
c = C()
cycle = set([c])
c.foo = cycle
p = pickle.dumps(cycle)
rcycle = pickle.loads(p)
print("SUCCESS" if next(iter(rcycle)).foo is rcycle
      else "FAIILURE")
dis(p)