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Re:Ask HN: Would you like to play a game? by junto on Thursday July 31, 2014 @08:51AM (#8113746)
I'm trying to figure out how these FIFA online sticker codes have been generated: Warning Ads! Disable JavaScript.

http://fifapaninicode7.appspot.com/

I was trying to figure out how they cracked it. Was harder than I thought. Thought I'd ask the brains on HN! :-)

Re:Ask HN: Would you like to play a game? by junto on Thursday July 31, 2014 @08:54AM (#8113761)
And here's some code I was mucking around with:

https://dotnetfiddle.net/lSHie4

A couple of things caught my interest so far as possibles:

http://en.wikipedia.org/wiki/International_Securities_Identi...

http://en.wikipedia.org/wiki/Base_36#Uses_in_practice