import java.util.*; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); while (sc.hasNext()) { String str = sc.next(); System.out.println(helper(str)); } } public static String helper(String str){ StringBuilder sb1=new StringBuilder(); StringBuilder sb2=new StringBuilder(); for(int i=0;i<str.length();i++){ if(str.charAt(i)>='a'&&str.charAt(i)<='z'){ sb1.append(str.charAt(i)); }else if(str.charAt(i)>='0'&&str.charAt(i)<='9'){ sb2.append(str.charAt(i)); } } char[]cs1=sb1.toString().toCharArray(); char[]cs2=sb2.toString().toCharArray(); Arrays.sort(cs1); Arrays.sort(cs2); StringBuilder sb=new StringBuilder(); for(char c:cs1)sb.append(c); for(char c:cs2)sb.append(c); return sb.toString(); } }