(VAR x y z )
(STRATEGY INNERMOST)
(RULES 
        b(y,z) -> f(c(c(y,z,z),a,a))
        b(b(z,y),a) -> z
        c(f(z),f(c(a,x,a)),y) -> c(f(b(x,z)),c(z,y,a),a)
        
)