#include <stdio.h>#include <string.h>int main(){char a[100];int n,l,j,k,i,tmp;while(scanf("%s",a)!=EOF){n = strlen(a);for(j=0;j<n-1;j++){//冒泡for(k=n-1;k>j;k--){if(a[k]<a[k-1]){tmp = a[k];a[k] = a[k-1];a[k-1] = tmp;}}}for(i=0;i<n;i++){printf("%c",a[i]); }}return 0;}