#include <stdio.h>
#include <stdlib.h>

int gethex() {
  register int c;
  while ((c = getchar()) >= 0) {
_gethex:
    if (c != '#') {
      c -= 48; // convert '0' - '9'
      if (c < 0) continue; // invalid, ignore
      if (c > 48) c -= 39; // convert 'a' - 'f'
      return c;
    }
    while ((c = getchar()) != '\n');
    goto _gethex;
  }
  exit(0);
}
int main() {
  register int hi,lo;
  while (1) {
    hi = gethex() << 4;
    lo = gethex();
    putchar(hi + lo);
  }
}