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We determine the new state by loading the character in the upper left of the cell and then XORing it with the value $14, which will convert one to the other while preserving lit/unlit status.
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While its key markets are “tier one” cities in the Asia-Pacific region, Aspire announced its intention to head west last December, having obtained licenses to operate in the U.S., Australia and Europe.
Graetz, Georg and Guy Michaels, "Robots at Work," Review of Economics and Statistics, 2018, 100 (5), 753–768.