#include <bits/stdc++.h>
using namespace std;
int main()
{
int i, k, b;
cin >> k;
i = 0;
string corp;
for(b = 1; b <= k; b ++)
{
cin >> corp;
if(corp == "Tetrahedron")
i = i + 4;
else if(corp == "Cube")
i = i + 6;
else if(corp == "Octahedron")
i = i + 8;
else if(corp == "Dodecahedron")
i = i + 12;
else if(corp == "Icosahedron")
i = i + 20;
}
cout << i;
return 0;
}
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