import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            String s = in.next();
            StringBuilder sb = new StringBuilder();
            int[] maxIndex = new int[s.length()];
            char max = s.charAt(s.length() - 1);
            int mi = s.length() - 1;
            for (int i = s.length() - 2; i >= 0; i--) {
                if (s.charAt(i) > max) {
                    max = s.charAt(i);
                    mi = i;
                }
                maxIndex[i] = mi;
            }
            for (int i = 0; i < s.length() - 1; i++) {
                if (maxIndex[i] != i) {
                    out.print(s.substring(0, i));
                    out.print(s.substring(maxIndex[i], maxIndex[i] + 1));
                    out.print(s.substring(i + 1, maxIndex[i]));
                    out.print(s.substring(i, i + 1));
                    out.println(s.substring(maxIndex[i] + 1, s.length()));
                    return;
                }
            }

            out.println(s);
        }

    }
}