#include <iostream>

using namespace std;

int main() {
	
	
	int min = 999,max = -1;
	
	int a;
	int sum = 0;
	for(int i = 0; i < 6; i++) {
		cin >> a;
		if(min > a)min = a;
		if(max < a)max = a;
		sum += a;
	}
	sum -= min + max;
	cout << sum;
	
	
	
}