(print (parse-integer (format nil "~8R" (let ((n (read-line))(p (parse-integer (read-line))))(print (parse-integer(concatenate 'string (subseq n 0 p)(reverse (subseq n p)))))))))
KHByaW50IChwYXJzZS1pbnRlZ2VyIChmb3JtYXQgbmlsICJ+OFIiIChsZXQgKChuIChyZWFkLWxpbmUpKShwIChwYXJzZS1pbnRlZ2VyIChyZWFkLWxpbmUpKSkpKHByaW50IChwYXJzZS1pbnRlZ2VyKGNvbmNhdGVuYXRlICdzdHJpbmcgKHN1YnNlcSBuIDAgcCkocmV2ZXJzZSAoc3Vic2VxIG4gcCkpKSkpKSkpKQ==