#include<bits/stdc++.h>
using namespace std;
int main()
{
    //freopen("number.in","r",stdin);
    //freopen("number.out","w",stdout);
	string s;
	cin>>s;
	if (s[0]==s[1]-1)
	{
		int x='9'-s[1];
		for (int i=0;i<s.size();i++)
		{
			if (s[i]+x>'9')
			{
				s[i]=s[i]-10+x;
			}
			else
			{
				s[i]+=x;
			}
		} 
		s[0]++;
		cout<<s;
		return 0;
	} 
	int x='9'-s[0];
	for (int i=0;i<s.size();i++)
	{
		if (s[i]+x>'9')
		{
			s[i]=s[i]-10+x;
		}
		else
		{
			s[i]+=x;
		}
	} 
	int i=0;
	while (s[i]=='9')
	{
		i++;
	}
	if (i==s.size())
	{
		cout<<s;
	}
	else
	{
		s[i]++;
		cout<<s;
	}
	return 0;
}