#include<stdio.h>
int main()
{
    int n;
    scanf("%d",&n);
    int count=0;
    char s1[1000000];
    char s2[]="Tetrahedron";
    char s3[]="Cube";
    char s4[]="Octahedron";
    char s5[]="Dodecahedron";
    char s6[]="Icosahedron";
    int i;
    for(i=0; i<n; i++)
    {
        scanf("%s",&s1);
        if(strcmp(s1,s2))
            count=count+4;
        if(strcmp(s1,s3))
            count=count+6;
        if(strcmp(s1,s4))
            count=count+8;
        if(strcmp(s1,s5))
            count=count+12;
        if(strcmp(s1,s6))
            count=count+20;

    }


    printf("%d",count);









    return 0;
}