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While exploring the galley you saw a spice cabinet; look carefully: can’t you see any numbers?
In the spice cabinet, the yellow bottles draw the number 2.
In the spice cabinet, the green bottles draw the number 1.
In the spice cabinet, the red bottles draw the number 3.
The first knob wants the green color (v), the second the yellow color (y), the third the red color (r). Therefore, the correct combination is 1v2y3r.