#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int main(int argc, char* argv[])
{
    int total = 0;

    string line1,line2,line3;
    while(getline(cin, line1))
    {
        getline(cin, line2);
        getline(cin, line3);

        sort(line1.begin(), line1.end());
        sort(line2.begin(), line2.end());
        sort(line3.begin(), line3.end());

        string first_intersection, second_intersection;
        set_intersection(line1.begin(), line1.end(), line2.begin(), line2.end(), back_inserter(first_intersection));
        set_intersection(first_intersection.begin(), first_intersection.end(), line3.begin(), line3.end(), back_inserter(second_intersection));

        int value;
        if (second_intersection[0] >= 'a')
        {
            value = second_intersection[0]-'a'+1;
        }
        else
        {
            value = second_intersection[0]-'A'+27;
        }
        
        total += value;
    }
    cout << total << endl;
}