#include <algorithm> #include <array> #include <cmath> #include <cstdio> #include <deque> #include <iomanip> #include <iostream> #include <numeric> #include <optional> #include <queue> #include <sstream> #include <unordered_map> #include <unordered_set> #include <vector> using namespace std; int main() { string s; cin >> s; int32_t cnt = 0; for (auto i = 0; i < s.size(); ++i) { if (s[i] != 'A') continue; ++cnt; } cout << cnt << endl; return 0; }