; @origtpdbfilename ./TRS/SK90/4.56.trs
; @xtcfilename "./TRS_Standard/SK90/4.56.xml"
(format TRS)
(fun f 2)
(fun a 0)
(fun b 0)
(fun c 0)
(fun d 0)
(rule (f a b) (f a c))
(rule (f c d) (f b d))