(VAR X X1 Y Z )
(STRATEGY CONTEXTSENSITIVE
        (2nd 1) 
        (cons1 1 2) 
        (cons 1) 
        (from 1) 
        (s 1) 
)
(RULES 
        2nd(cons1(X, cons(Y, Z))) -> Y
        2nd(cons(X, X1)) -> 2nd(cons1(X, X1))
        from(X) -> cons(X, from(s(X)))
        
)