Of course the 171 chip is yours and you can do what you like with it, BUT at 3:30 Phyllis asked if you had an extra. At 4:10 you replied you don't. At 9:50 you offer to throw it in the contest.
I bet Phyllis would have bought it from you.
Again your chip to do what you like with it, but why not let Phyllis have it. She collects chips with any combination of 117
() 
hehehehe 
DID YOU EVEN THIMK ABOUT IT?