import java.util.*;
import java.io.*;
public class repeatless {
    public static void main(String args[]) {
	int ans[]=new int[1000001];
	int rep=1;
	int cur=1;
	while(rep<=1000000) {
	    //check whether repeatless
	    int temp=cur;
	    boolean used[]=new boolean[10];
	    boolean good=true;
	    while(temp>0) {
		if(used[temp%10]) { good=false; break;} 
		used[temp%10]=true;
		temp=temp/10;
	    }
	    if(good) ans[rep++]=cur;
	    cur++;
	}
	try {
	    BufferedReader br=new BufferedReader(new
						 InputStreamReader(System.in));
	    while(true) {
		StringTokenizer tok=new StringTokenizer(br.readLine()," ");
		cur=Integer.parseInt(tok.nextToken());
		if(cur==0) break;
		System.out.println(ans[cur]);
	    }
	}catch(Exception e) {
	    e.printStackTrace();
	}
    }
}