代码如下：

#include <bits/stdc++.h>
using namespace std;
int main(){
    string a;
    int n, sum = 0;
    cin>>n;
    for (int i = 0; i < n; i++){
        cin>>a;
        for (int j = 0; j < 13; j++){
            if (a[i] == 'A') sum+=4;
            if (a[i] == 'K') sum+=3;
            if (a[i] == 'Q') sum+=2;
            if (a[i] == 'J') sum+=1;
        }
    }
    printf("%d", sum);
    return 0;
}