(letrec* ((s (string->vector (read-line)))
          (l (map string->number (string-split (read-line) " ")))
          (i (car l))
          (j (cadr l))
          (p (lambda (n l)
            (if (= n l) '()
                        (begin 
                          (display (vector-ref s (if (= n i) j (if (= n j) i n))))
                          (p (+ n 1) l))))))
          (p 0 (vector-length s))
          (newline))