(VAR x y z)
(RULES
a(lambda(x),y) -> lambda(a(x,1))
a(lambda(x),y) -> lambda(a(x,a(y,t)))
a(a(x,y),z) -> a(x,a(y,z))
lambda(x) -> x
a(x,y) -> x
a(x,y) -> y
)
(COMMENT simple termination of SUBST after distribution elimination,
see Zantema, JSC 1994)