/home/nowonder/forschung/aprove/TPDB05/TRS/Zantema/z17.trs

The program

(VAR x y )
(RULES
f(x,a(b(y))) -> f(c(d(x)),y)
f(c(x),y) -> f(x,a(y))
f(d(x),y) -> f(x,b(y))
)
(COMMENT TRS variant of ab -> dc, c -> a, d -> b )

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