#!/usr/local/bin/python2
from itertools import ifilter
l = ({1:1}, {2:1}, {3:1}, {4:1}, {5:5}, {6:1}, {7:1}, {8:1}, {9:1})
for i in xrange(500000):
  a = ifilter(None, (e.get(5) for e in l))
  v = next(a)
print v