import java.io.File;
import java.io.FileNotFoundException;
import java.util.Arrays;
import java.util.Scanner;


public class EX05_Number {
	public static void main(String[] args) throws FileNotFoundException {
		File file = new File("ex05.txt");
		Scanner fin = new Scanner(file);
		String num = fin.nextLine();
		int len = num.length();
		int[] nums = new int[len];
		for(int k=0; k< len; k++) {
			nums[k] = num.charAt(k) - '0';
			System.out.printf("%d", nums[k]);
		}
		System.out.println();
		
		Arrays.sort(nums);
		for(int k=len-1; k >= 0 ; k--) {
			System.out.printf("%d", nums[k]);
		}
	}
}