(VAR x y z) (RULES app(app(app(f, 0), 1), x) -> app(app(app(f, x), x), x) app(app(app(f, x), y), z) -> 2 0 -> 2 1 -> 2 app(app(app(g, x), x), y) -> y app(app(app(g, x), y), y) -> x ) (STRATEGY INNERMOST)
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