#include <stdio.h>
#include <time.h>
 
int main() {
  int y, m, d;
  scanf("%d/%d/%d", &y, &m, &d);

  struct tm t={};
  t.tm_year = y-1900;
  t.tm_mon  = m-1;
  t.tm_mday = d+2;

  if (mktime(&t) != (time_t)-1) {
    char s[16];
    strftime(s, 16, "%Y/%m/%d", &t);
    printf("%s\n", s);
  }
  return 0;
}