#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

int main() {
    string s[3];
    string line;
    getline(cin, line);
    int i = 0;
    while(i < 3){
        getline(cin, line);
        s[i] = line;
        i++;
        rep(j,line.size()){
            if(line[j] == ' '){
                cout << "\"assert\"" << endl;
                return 0;
            }
        }
    }

    ll a[3] = {};
    rep(i,3){
        rep(j,s[i].size()){
            a[i] = a[i] * 10 + s[i][j] - '0';
        }
    }
    sort(a,a+3);
    if(a[0] == a[1]) cout << a[0] + a[1] << endl;
    else cout << a[0] + a[2] << endl;
    
    return 0;
}