#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, i, sum = 0;
  string s;
  int Icosahedron = 20, Cube = 6, Tetrahedron = 4, Dodecahedron = 12,
      Octahedron = 8;
  while (cin >> n) {
    for (i = 0; i < n; i++) {
      cin >> s;
      if (s == "Icosahedron")
        sum = sum + 20;
      else if (s == "Cube")
        sum = sum + 6;
      if (s == "Tetrahedron") sum = sum + 4;
      if (s == "Dodecahedron") sum = sum + 12;
      if (s == "Octahedron") sum = sum + 8;
    }
    cout << sum << endl;
    sum = 0;
  }
}
