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import java.io.*;

/**
 * Created by Tamil on 6/3/2015.
 */
public class Solution{
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter out = new BufferedWriter(new OutputStreamWriter(System.out));
        String a = in.readLine();
        int acode[] = new int[26];
        for (int i = 0; i <a.length(); i++) {
            acode[a.charAt(i)-'a']++;
        }

        String b = in.readLine();
        String c = in.readLine();
        if(b.length() > c.length()){
            find(b, acode, out);
            find(c, acode, out);
        }else {
            find(c, acode, out);
            find(b, acode, out);
        }

        int i=0;
        while(i<26){
            if(acode[i]-- > 0) {
                out.write(""+(char)(i+'a'));
            }else i++;
        }

        out.flush();
        out.close();
        in.close();
        System.exit(0);
    }

    private static void find(String b, int[] acode, BufferedWriter out) throws IOException {
        int blen = 0;
        for (int i = 0; i < b.length(); i++) {
            if(acode[b.charAt(i)-'a'] > 0) blen++;
        }
        if(blen == b.length()) {
            out.write(b);
            for (int i = 0; i < b.length(); i++) {
                acode[b.charAt(i)-'a']--;
            }
        }
    }
}