#include <bits/stdc++.h>
using namespace std;
// #define int long long
using ll=long long;
using vi=vector<int>;
using vl=vector<long long>;
using pii=pair<int,int>;
using pll=pair<ll,ll>;
#define ITR(v,c) for(auto v=begin(c);v!=end(c);v++)
#define FORE(x,c) for(auto &x:c)
#define FOR(v,a,n) for(int v=a;v<(int)(n);v++)
#define REP(v,n) FOR(v,0,n)
#define RREP(v,n) for(int v=((int)(n)-1);v>=0;v--)
#define ALL(c) begin(c),end(c)
#define RALL(c) rbegin(c),rend(c)
#define SZ(c) ((int)c.size())
const int DX[9]={0,1,0,-1,1,1,-1,-1,0}, DY[9]={-1,0,1,0,-1,1,1,-1,0};
const int INF=1e9; const long long INFLL=1e18;
template<class T> ostream& operator << (ostream &os, const vector<T> &v) {
    ITR(i,v) os<<*i<<(i==end(v)-1?"":" "); return os; }
template<class T> istream& operator >> (istream &is, vector<T> &v) {
    ITR(i,v) is>>*i; return is; }
//------------------------------------------------------------------------------

signed main() {
    string a;
    cin>>a;
    vi b;
    FORE(x,a) b.push_back(x-'0');
    int ans=0;
    while(true) {
        for(int x=9; x>=1; x--) {
            for(int y=9; y>=0; y--) {
                if(x==y) continue;
                int f=0;
                vi c,w;
                REP(i,SZ(b)) {
                    if(f==0 && b[i]==x) f++,c.push_back(i);
                    if(f!=0 && b[i]==y) f++,w.push_back(i);
                }
                if(f>=3) {
                    b[c[0]]=-1;
                    b[w[0]]=-1;
                    b[w[1]]=-1;
                    ans+=x*100+y*10+y;
                    // dump(x,y,x*100+y*10+y,b);
                    goto next;
                }
            }
        }
        break;
        next:;
    }
    cout<<ans<<endl;
    return 0;
}