#include <stdio.h>
#include <string.h>

int charcmp(const char *c1, const char *c2) {
  return(*c1-*c2);
}

int main(int argc, char **argv) {
char word[256], canon[256];
  for (;;) {
    if (gets(word) == NULL) break;
    strcpy(canon, word);
    qsort(canon, strlen(canon), sizeof(char), charcmp);
    printf("%s%s\n", canon, word);
  }
  return(0);
}