#![allow(unused_imports)]

fn main() {
    input! {
        mut n: Bytes,
    }
    for c in &mut n {
        *c -= b'0';
    }
    if let Some((mut i, _)) = n.iter().find_position(|&&c| c < 4) {
        for c in n.iter_mut().skip(i) {
            *c = 9;
        }
        if i == 0 {
            n.remove(0);
        }
        while i > 0 {
            n[i-1] -= 1;
            n[i] = 9;
            if n[i-1] >= 4 {
                break;
            }
            i -= 1;
        }
    }
    if n[0] < 4 {
        n.remove(0);
    }
    let mut ans = vec![];
    for c in n {
        ans.push((if c <= 4 { 4 } else { 5 } + b'0') as char);
    }
    println!("{}", ans.iter().join(""));
}

/*
a
*/

use itertools::{Itertools as _, iproduct, izip};
use proconio::{input, marker::*};
use std::{cell::RefCell, cmp::Reverse, collections::*, thread::LocalKey};

#[macro_export]
macro_rules! chmax {
    ($a:expr, $b:expr) => {{
        let tmp = $b;
        if $a < tmp {
            $a = tmp;
            true
        } else {
            false
        }
    }};
}

#[macro_export]
macro_rules! chmin {
    ($a:expr, $b:expr) => {{
        let tmp = $b;
        if $a > tmp {
            $a = tmp;
            true
        } else {
            false
        }
    }};
}

#[macro_export]
/// mvec![]
macro_rules! mvec {
    ($val:expr; ()) => {
        $val
    };
    ($val:expr; ($size:expr $(,$rest:expr)*)) => {
        vec![mvec![$val; ($($rest),*)]; $size]
    };
}