#include <bits/stdc++.h>
using namespace std;

int main(){
    int n;
    string s;
    cin>>n;
    int sum=0;
    while(n--){
        cin>>s;
        for(int i=0; i<s.size(); i++){
            if(s[i]=='J') sum += 1;
            else if(s[i]=='Q') sum += 2;
            else if(s[i]=='K') sum += 3;
            else if(s[i]=='A') sum += 4;
        }
    }
    cout<<sum<<endl;

    return 0;
}