#include <cstdio>#include <cmath>#include <cstring>#include <map>#include <algorithm>using namespace std;int n;char s[1000];int sum;int main(){	scanf("%d",&n);	for(int i=1;i<=n;i++)	{		scanf("%s",s);		if(s[0]==‘T‘) sum+=4;		if(s[0]==‘C‘) sum+=6;		if(s[0]==‘O‘) sum+=8;		if(s[0]==‘D‘) sum+=12;		if(s[0]==‘I‘) sum+=20;	}	printf("%d\n",sum);	return 0;}