(define answer (lambda () (letrec ( (is_it_it (lambda (x y) (if (> y x) (newline) (if (= 0 (remainder x y)) (begin (display x) (newline) (display y) ) (is_it_it x (+ 9 (* 10 y))) ) ) ) ) (finder (lambda (x) (begin (is_it_it x 19) (if (< x 3999999999999999999999999999999999999999999999) (finder (+ 9 (* 10 x))) ) ) ) ) ) (finder 399) ) ) ) (answer)