Is there only one?
I have to add signature or something, because the message above - albeit perfectly answering the question - is too short
yeah, i've been working on some more. i didn't understand the concept at first. so far i have 4, but i think thats it.
I have 6
damn. i handed in my assignment saying there were four.
Most likely you missed cyclic ones.
No, there are more.
Separate names with a comma.