User talk:Unctime

November 2008
Welcome to Wikipedia. The recent edit you made to Substitution problem has been reverted, as it appears to be unconstructive. Use the sandbox for testing; if you believe the edit was constructive, ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. (ESkog)(Talk) 23:17, 19 November 2008 (UTC)