x = object()
y = object()

# change this code
x_list = [x] * 10
y_list = [y] * 10
big_list = x_list + y_list

print "x_list contains %d objects" % len(x_list)
print "y_list contains %d objects" % len(y_list)
print "big_list contains %d objects" % len(big_list)

# testing code
if x_list.count(x) == 10 and y_list.count(y) == 10:
    print "Almost there..."
if big_list.count(x) == 10 and y_list.count(y) == 10:
    print "Great!"