#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int,int>;
const int N = 1e6+10;
int t,n,m,k,l,r,op,x,y;
string str;
void solve(){
    cin>>n;
    for(int i = 1;i<=n;i++){
        cin>>str;
        for(char&ch:str){
            if(ch=='J')t+=1;
            else if(ch=='Q')t+=2;
            else if(ch=='K')t+=3;
            else if(ch=='A')t+=4;
//          else if(isdigit(ch))t+=ch-'0';
        }
    }
    cout<<t;
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);  
    solve();
    return 0;
}