// yukicoder
#include <bits/stdc++.h>
using namespace std;

int main()
{
    vector<int> vec(9);
    
    int sum = 0;
    for (int i = 0; i < 9; ++i){
        cin >> vec[i];
        sum += vec[i];
    } 

    cout << 55 - sum << "\n";

    return 0;
}