import java.util.*; public class Main{ public static void main(String[]args){ Scanner sc=new Scanner(System.in); while(sc.hasNextLine()){ String[] s=sc.nextLine().split(","); Arrays.sort(s); for(int i=0;i<s.length;i++){ if(i!=s.length-1){ System.out.print(s[i]+","); } else{ System.out.print(s[i]); } } System.out.println(); } } }