All possible combinations would be:

x y z
true 1 blue
true 2 white
true 3 red
true 1 white
true 2 red
...
false 1 white
false 2 red
false 3 blue
false 1 white
false 2 red
...
null 1 red
null 2 blue
null 3 white
null 1 red
null 2 blue
...

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