#include <stdio.h>

/* Samsung SSD Firmware Deobfuscation Tool
 * v0.2 - 2015/02/06 by Harry Sintonen <sintonen@iki.fi>
 * Public Domain
 *
 * Inspired by the insanely complex original at:
 * https://github.com/ddcc/samsung_ssd/blob/30b1b28398964d8253625527d65d4a2c9e6d3049/samsung.c
 */

int main(void)
{
  int c;

  while ((c = getchar()) != EOF)
    putchar( ( c >> 5 ^ -!(c & 16) ) << 4 | c & 0xf );

  return 0;
}