/home/nowonder/forschung/aprove/TPDB05/TRS/Zantema/z08.trs

The program

(VAR x)
(RULES
f(a,f(b,f(a,x))) -> f(a,f(b,f(b,f(a,x))))
f(b,f(b,f(b,x))) -> f(b,f(b,x))
)

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