#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3phCa4T ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// e
signed main(){
_3phCa4T;
int n;
cin>>n;
int res=0;
rep(i,n){
string s;
cin>>s;
for(auto ch:s){
if(ch=='A')res+=4;
else if(ch=='K')res+=3;
else if(ch=='Q')res+=2;
else if(ch=='J')res+=1;
}
}
print(res);
}
