Question 1152460
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Pardon, &nbsp;for &nbsp;<U>WHICH</U> &nbsp;vertex &nbsp;&nbsp;&nbsp;&nbsp;?   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;?&nbsp;?    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;?&nbsp;?&nbsp;?



It seems to me that you just celebrate the Valentine day, &nbsp;in parallel posting one nonsensical post after other . . . 



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Happy Valentine day (!)