1-%3E2%202-%3E3%203-%3E4%204-%3E5%201-%3E6%202-%3E6%202-%3E6%202-%3E6%201-%3E2%203-%3E3%203-%3E6%204-%3E4%20graph

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.