#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define MASK(x) (1LL << (x))
#define BIT(x, i) (((x) >> (i)) & 1)
#define SZ(x) ((int) (x).size())
#define ALL(a) (a).begin(), (a).end()
#define FOR(i, a, b) for (int i = (a); i <= (b); ++i)
#define FORD(i, a, b) for (int i = (a); i >= (b); --i)
#define debug(x) cerr << "[" << #x << " = " << (x) << "]" << endl
#define left __left
#define right __right
#define prev __prev
#define fi first
#define se second
template <class X, class Y>
bool maximize(X &x, Y y) {
if (x < y) return x = y, true;
else return false;
}
template <class X, class Y>
bool minimize(X &x, Y y) {
if (x > y) return x = y, true;
else return false;
}
int main() {
ios_base::sync_with_stdio(false);cin.tie(nullptr);
int t;
cin >> t;
int ans = 0;
while (t--) {
string s; cin >> s;
for (char c : s) if (c == 'A') ans += 4;
else if (c == 'K') ans += 3;
else if (c == 'Q') ans += 2;
else if (c == 'J') ans += 1;
}
cout << ans;
return 0;
}
/* Discipline - Calm */
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