#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define all(a)  (a).begin(),(a).end()
#define pb push_back
#define INF (1e9+1)
//#define INF (1LL<<59)


int getNum(char c1,char c2){
    return (c1-'0')*100 + (c2-'0')*11;
}


int main(){
    string s;
    cin>>s;
    
    int dp[1<<13];
    
    rep(i,1<<13)dp[i] = -INF;
    dp[0] = 0;
    
    rep(b,1<<s.size()){
        rep(i,s.size()-2){
            if( (b&(1<<i))!=0 )continue;
            if(s[i]=='0')continue;
            for(int j=i+1;j<s.size();j++){
                if( (b&(1<<j))!=0 )continue;
                for(int k=j+1;k<s.size();k++){
                    if( (b&(1<<k))!=0 )continue;
                    if(s[j]!=s[k])continue;
                    if(s[i]==s[j])continue;
                    
                    int bit = (1<<i) + (1<<j) + (1<<k);
                    dp[b | bit] = max(dp[b | bit],dp[b]+getNum(s[i],s[j]));
//                    cout<<bitset<6>(b | bit)<<" "<<dp[b|bit]<<endl;
                }
            }
        }
    }
    int ans = -INF;
    
    rep(i,1<<s.size())ans = max(ans,dp[i]);
    cout<<ans<<endl;
}