PHILADELPHIA - The least the Mets could have hoped for afterbeing neatly put to sleep by Roy Halladay was to put the reigningNational League Cy Young Award winner behind them and move on toeasier assignments. But what awaited them little more than 24 hours later was a datewith Cliff Lee, the 2008 American League Cy Young Award winner. Andafter a day off today to catch their breath and a slight reprieveTuesday, the Mets are back to a nightmarishstretch, paired up Wednesday against the San Francisco Giants andTim Lincecum, the 2008 and '09 National League Cy Young Awardwinner. "You say, well, it's not going to be easy," Jose Reyes said."But you still have to go out there and compete. It's a challenge.Everybody knows that they are good. But you still have to go outthere and compet