; @origtpdbfilename ./TRS/various/15.trs
; @xtcfilename "./TRS_Standard/Various_04/15.xml"
(format TRS)
(fun f 1)
(fun s 1)
(fun p 1)
(fun |0| 0)
(rule (f (s x)) (s (s (f (p (s x))))))
(rule (f |0|) |0|)
(rule (p (s x)) x)