Codeforces_785A

// Codeforces 785A

#include <iostream>

using namespace std;

int main()
{
    int n, rez = 0;
    string str;
    cin >> n;
    for( int i = 0; i < n; i++ )
    {
        cin >> str;
        if( str == "Tetrahedron" ){ rez += 4;}
        else if( str == "Cube" ){ rez += 6; }
        else if( str == "Octahedron" ){ rez += 8; }
        else if( str == "Dodecahedron" ){ rez += 12; }
        else if( str == "Icosahedron" ){ rez += 20; }
    }
    cout << rez;
    return 0;
}