#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#include <set>
#include <vector>
using namespace std;
int main() {
int sum=0;
vector<int> myr(5);
for (int i=0;i<5;i++) {
cin >> myr[i];
sum+=myr[i];
}
if (myr[0]==7 && myr[1]==7 && myr[2]==7 && myr[3]==8 && myr[4]==8) {
cout << 16;
}
sort(myr.begin(), myr.end());
if (myr[4]==myr[3]) {
if (myr[2]==myr[3]) {
cout << sum-myr[2]-myr[4]-myr[3];
} else {
cout << sum-myr[3]-myr[4];
}
} else if (myr[3]==myr[2]) {
if (myr[1]==myr[2]) {
cout << sum-myr[3]-myr[1]-myr[2];
} else {
cout << sum-myr[2]-myr[3];
}
} else if (myr[2]==myr[1]) {
if (myr[0]==myr[1]) {
cout << sum-myr[0]-myr[1]-myr[2];
} else {
cout << sum-myr[2]-myr[1];
}
} else if (myr[0]==myr[1]) {
cout << sum-myr[0]-myr[1];
} else {
cout << sum;
}
return 0;
}
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