(VAR X Y Z X1 X2) (RULES active(sel(s(X),cons(Y,Z))) -> mark(sel(X,Z)) active(sel(0,cons(X,Z))) -> mark(X) active(first(0,Z)) -> mark(nil) active(first(s(X),cons(Y,Z))) -> mark(cons(Y,first(X,Z))) active(from(X)) -> mark(cons(X,from(s(X)))) active(sel1(s(X),cons(Y,Z))) -> mark(sel1(X,Z)) active(sel1(0,cons(X,Z))) -> mark(quote(X)) active(first1(0,Z)) -> mark(nil1) active(first1(s(X),cons(Y,Z))) -> mark(cons1(quote(Y),first1(X,Z))) active(quote(0)) -> mark(01) active(quote1(cons(X,Z))) -> mark(cons1(quote(X),quote1(Z))) active(quote1(nil)) -> mark(nil1) active(quote(s(X))) -> mark(s1(quote(X))) active(quote(sel(X,Z))) -> mark(sel1(X,Z)) active(quote1(first(X,Z))) -> mark(first1(X,Z)) active(unquote(01)) -> mark(0) active(unquote(s1(X))) -> mark(s(unquote(X))) active(unquote1(nil1)) -> mark(nil) active(unquote1(cons1(X,Z))) -> mark(fcons(unquote(X),unquote1(Z))) active(fcons(X,Z)) -> mark(cons(X,Z)) active(sel(X1,X2)) -> sel(active(X1),X2) active(sel(X1,X2)) -> sel(X1,active(X2)) active(s(X)) -> s(active(X)) active(cons(X1,X2)) -> cons(active(X1),X2) active(first(X1,X2)) -> first(active(X1),X2) active(first(X1,X2)) -> first(X1,active(X2)) active(from(X)) -> from(active(X)) active(sel1(X1,X2)) -> sel1(active(X1),X2) active(sel1(X1,X2)) -> sel1(X1,active(X2)) active(first1(X1,X2)) -> first1(active(X1),X2) active(first1(X1,X2)) -> first1(X1,active(X2)) active(cons1(X1,X2)) -> cons1(active(X1),X2) active(cons1(X1,X2)) -> cons1(X1,active(X2)) active(s1(X)) -> s1(active(X)) active(unquote(X)) -> unquote(active(X)) active(unquote1(X)) -> unquote1(active(X)) active(fcons(X1,X2)) -> fcons(active(X1),X2) active(fcons(X1,X2)) -> fcons(X1,active(X2)) sel(mark(X1),X2) -> mark(sel(X1,X2)) sel(X1,mark(X2)) -> mark(sel(X1,X2)) s(mark(X)) -> mark(s(X)) cons(mark(X1),X2) -> mark(cons(X1,X2)) first(mark(X1),X2) -> mark(first(X1,X2)) first(X1,mark(X2)) -> mark(first(X1,X2)) from(mark(X)) -> mark(from(X)) sel1(mark(X1),X2) -> mark(sel1(X1,X2)) sel1(X1,mark(X2)) -> mark(sel1(X1,X2)) first1(mark(X1),X2) -> mark(first1(X1,X2)) first1(X1,mark(X2)) -> mark(first1(X1,X2)) cons1(mark(X1),X2) -> mark(cons1(X1,X2)) cons1(X1,mark(X2)) -> mark(cons1(X1,X2)) s1(mark(X)) -> mark(s1(X)) unquote(mark(X)) -> mark(unquote(X)) unquote1(mark(X)) -> mark(unquote1(X)) fcons(mark(X1),X2) -> mark(fcons(X1,X2)) fcons(X1,mark(X2)) -> mark(fcons(X1,X2)) proper(sel(X1,X2)) -> sel(proper(X1),proper(X2)) proper(s(X)) -> s(proper(X)) proper(cons(X1,X2)) -> cons(proper(X1),proper(X2)) proper(0) -> ok(0) proper(first(X1,X2)) -> first(proper(X1),proper(X2)) proper(nil) -> ok(nil) proper(from(X)) -> from(proper(X)) proper(sel1(X1,X2)) -> sel1(proper(X1),proper(X2)) proper(quote(X)) -> quote(proper(X)) proper(first1(X1,X2)) -> first1(proper(X1),proper(X2)) proper(nil1) -> ok(nil1) proper(cons1(X1,X2)) -> cons1(proper(X1),proper(X2)) proper(01) -> ok(01) proper(quote1(X)) -> quote1(proper(X)) proper(s1(X)) -> s1(proper(X)) proper(unquote(X)) -> unquote(proper(X)) proper(unquote1(X)) -> unquote1(proper(X)) proper(fcons(X1,X2)) -> fcons(proper(X1),proper(X2)) sel(ok(X1),ok(X2)) -> ok(sel(X1,X2)) s(ok(X)) -> ok(s(X)) cons(ok(X1),ok(X2)) -> ok(cons(X1,X2)) first(ok(X1),ok(X2)) -> ok(first(X1,X2)) from(ok(X)) -> ok(from(X)) sel1(ok(X1),ok(X2)) -> ok(sel1(X1,X2)) quote(ok(X)) -> ok(quote(X)) first1(ok(X1),ok(X2)) -> ok(first1(X1,X2)) cons1(ok(X1),ok(X2)) -> ok(cons1(X1,X2)) quote1(ok(X)) -> ok(quote1(X)) s1(ok(X)) -> ok(s1(X)) unquote(ok(X)) -> ok(unquote(X)) unquote1(ok(X)) -> ok(unquote1(X)) fcons(ok(X1),ok(X2)) -> ok(fcons(X1,X2)) top(mark(X)) -> top(proper(X)) top(ok(X)) -> top(active(X)) )