(RULES
  f(f(f(f(a)))) -> a
  c -> h(f(f(c)),f(f(h(f(f(a)),h(h(b,h(c,c)),f(c))))))
  f(a) -> c
  b -> f(a)
  f(a) -> f(c)
)
(COMMENT
Cops #647 - #721: generated ground TRSs; evenly distributed in the
UNR/UNC/NFP/CR hierarchy
submitted by: Bertram Felgenhauer
)