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Can U Walk This?

Can u walk this? Can u walk this? Can u walk this? Can u walk this? Some citizens of Königsberg were walking on the strand beside the river Pegel with its seven bridges spanned. Seven bridges spanned, seven bridges spanned, seven bridges spanned, seven bridges spanned. Can u walk this? Can u walk this? Can u walk this? Can u walk this? "Oh Euler come and walk with us!" those burghers did beseech, "We'll walk the seven bridges o'er and pass but once by each!" Once by each, once by each, once by each, once by each. Stop! Euler time! Then Euler cried, "It can't be done! here comes the QED: Your islands are but vertices, and four have odd degree!" Odd degree, QED, odd degree, QED, odd degree, QED, odd degree, QED. U can't walk this! U can't walk this! U can't walk this! U can't walk this! No! U can't walk this...