#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int st_in(const void* elem1, const void* elem2) {
return strcmp((char*)elem1, (char*)elem2);
}
int main() {
char s[105];
scanf("%s", &s);//直接输入字符串
int len = strlen(s);
qsort(s, len, sizeof(s[0]), st_i...