User talk:47.220.235.153

Hello, I'm David Eppstein. I wanted to let you know that one or more of your recent contributions&#32;to Line graph have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Teahouse. Thanks. —David Eppstein (talk) 01:15, 26 February 2021 (UTC)