codeforces 785A - Anton and Polyhedrons

import sys
n=int(input())
ans=0
for i in range(n):
    s=input()
    if s == 'Tetrahedron':
        ans += 4
    if s == 'Cube':
        ans += 6
    if s == 'Octahedron':
        ans += 8
    if s == 'Dodecahedron':
        ans += 12
    if s == 'Icosahedron':
        ans += 20
print(ans)