import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Euler24 {

    private static class Options {
        long index = 1000000L;
        String digits = "0123456789";
        boolean runCheckpoints = true;
    }

    private static boolean parseULongAfterPrefix(String arg, String prefix, long[] valueRef) {
        if (!arg.startsWith(prefix)) {
            return false;
        }
        String tail = arg.substring(prefix.length());
        if (tail.isEmpty()) {
            return false;
        }

        long parsed = 0L;
        for (int i = 0; i < tail.length(); i++) {
            char c = tail.charAt(i);
            if (c < '0' || c > '9') {
                return false;
            }
            int digit = c - '0';
            if (parsed > (Long.MAX_VALUE - digit) / 10L) {
                return false;
            }
            parsed = parsed * 10L + digit;
        }

        valueRef[0] = parsed;
        return true;
    }

    private static boolean parseStringAfterPrefix(String arg, String prefix, String[] valueRef) {
        if (!arg.startsWith(prefix)) {
            return false;
        }
        String tail = arg.substring(prefix.length());
        if (tail.isEmpty()) {
            return false;
        }
        valueRef[0] = tail;
        return true;
    }

    private static boolean parseArguments(String[] args, Options options) {
        for (String arg : args) {
            if ("--skip-checkpoints".equals(arg)) {
                options.runCheckpoints = false;
                continue;
            }

            long[] indexRef = new long[1];
            if (parseULongAfterPrefix(arg, "--index=", indexRef)) {
                options.index = indexRef[0];
                continue;
            }

            String[] digitsRef = new String[1];
            if (parseStringAfterPrefix(arg, "--digits=", digitsRef)) {
                options.digits = digitsRef[0];
                continue;
            }

            System.err.println("Unknown argument: " + arg);
            return false;
        }

        return options.index >= 1L && !options.digits.isEmpty();
    }

    private static long factorial(int n) {
        long value = 1L;
        for (int k = 2; k <= n; k++) {
            if (value > Long.MAX_VALUE / k) {
                throw new RuntimeException("factorial overflow");
            }
            value *= k;
        }
        return value;
    }

    private static String nthLexicographicPermutation(String digits, long indexOneBased) {
        char[] chars = digits.toCharArray();
        java.util.Arrays.sort(chars);
        String sortedDigits = new String(chars);
        int n = sortedDigits.length();

        long total = factorial(n);
        if (indexOneBased < 1L || indexOneBased > total) {
            throw new RuntimeException("Permutation index out of range");
        }

        long rank = indexOneBased - 1L;
        StringBuilder answer = new StringBuilder(n);

        List<Character> pool = new ArrayList<>();
        for (char c : sortedDigits.toCharArray()) {
            pool.add(c);
        }

        for (int remaining = n; remaining > 0; remaining--) {
            long block = factorial(remaining - 1);
            int pickIndex = (int)(rank / block);
            rank %= block;

            answer.append(pool.get(pickIndex));
            pool.remove(pickIndex);
        }

        return answer.toString();
    }

    private static String solve(Options options) {
        return nthLexicographicPermutation(options.digits, options.index);
    }

    private static boolean runCheckpoints() {
        if (!nthLexicographicPermutation("012", 1L).equals("012")) {
            System.err.println("Checkpoint failed for first permutation");
            return false;
        }
        if (!nthLexicographicPermutation("012", 6L).equals("210")) {
            System.err.println("Checkpoint failed for last permutation");
            return false;
        }
        return true;
    }

    public static void main(String[] args) {
        Options options = new Options();
        if (!parseArguments(args, options)) {
            System.exit(1);
        }

        if (options.runCheckpoints && !runCheckpoints()) {
            System.exit(2);
        }

        try {
            System.out.println(solve(options));
        } catch (Exception ex) {
            System.err.println(ex.getMessage());
            System.exit(3);
        }

        System.exit(0);
    }
}