/home/nowonder/forschung/aprove/TPDB05/TRS/Zantema/z19.trs

The program

(VAR x y z)
(RULES
f(f(a,a),x) -> f(a,f(b,f(a,x)))
f(x,f(y,z)) -> f(f(x,y),z)
)
(COMMENT: TRS variant of aa -> aba )