using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

class TEST{
	static void Main(){
		Sol mySol =new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		
		int N = S.Length;
		int[] dp = new int[1<<N];
		for(int t=0;t<(1<<N);t++){
			for(int i=0;i<N;i++){
				for(int j=i+1;j<N;j++){
					for(int k=j+1;k<N;k++){
						if( ((t>>i)&1) == 0 && ((t>>j)&1) == 0 && ((t>>k)&1) == 0 && S[i] != S[j] && S[j] == S[k] && S[i] != 0){
							dp[ t | (1<<i) | (1<<j) | (1<<k) ] = Math.Max(dp[ t | (1<<i) | (1<<j) | (1<<k) ],dp[t]+100*S[i]+10*S[j]+S[k]);
						}
					}
				}
			}
		}
		Console.WriteLine(dp.Max());
		
		
		
	}
	int[] S;
	public Sol(){
		S = rs().Select(c => (int) c - '0').ToArray();
	}

	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(char sep=' '){return Console.ReadLine().Split(sep);}
	static int[] ria(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>int.Parse(e));}
	static long[] rla(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>long.Parse(e));}
	static double[] rda(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>double.Parse(e));}
}