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x.subs?
x.sunstitute_function?

Seasonings to taste...

x.subs? x.sunstitute_function?

x.sunstitute_function?

Seasonings to taste...

x.subs? x.sunstitute_function?x.sugstitute_function?

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x.subs?
    x.sugstitute_function?

x.sugstitute_function?

Seasonings to taste...