(VAR X Y Z )
(STRATEGY CONTEXTSENSITIVE
        (from 1) 
        (cons 1) 
        (s 1) 
        (sel 1 2) 
        (0 ) 
)
(RULES 
        from(X) -> cons(X, from(s(X)))
        sel(0, cons(X, Y)) -> X
        sel(s(X), cons(Y, Z)) -> sel(X, Z)
        
)