module Yuki

open System
open System.Text

let solve n =
    let num2list n =
        let rec f acc n =
            if n < 10 then n :: acc
            else f (n % 10 :: acc) (n / 10)
        f [] n
 
    let rec list2str (acc : StringBuilder) =
        function
        | [] -> acc.ToString()
        | x :: xs -> list2str (acc.Append(string x)) xs

    let rec f (acc : StringBuilder) xs =        
        match xs with
        | [] -> acc.ToString()
        | y :: ys -> 
            let xsMax = xs |> List.max
            if y = xsMax then
                f (acc.Append(string y)) ys
            else
                let swapRightIdx =
                    ys
                    |> List.indexed
                    |> List.findBack (fun (_, x) -> x = xsMax)
                    |> fun (idx, _) -> idx
                let xs' =
                    ys
                    |> List.mapi (fun i v ->
                        match i with
                        | _ when i = swapRightIdx -> y
                        | _ -> v)
                list2str (acc.Append(string ys.[swapRightIdx])) xs'
    
    n
    |> num2list
    |> f (new StringBuilder())

let N = int <| Console.ReadLine()

solve N
|> Console.WriteLine