#include <iostream>
#include <string>
#include <sstream>
#include <set>

using namespace std;

int PrintResult(string msg) {
int count = 0;

// Define the set of allowed characters
set<char> allowed = {'H', 'I', 'N', 'O', 'S', 'X', 'Z', 'W'};

// Use stringstream to split the message into words
stringstream ss(msg);
string word;

while (ss >> word) {
bool isOutstanding = true;

// Check if all characters in the word are in the allowed set
for (char c : word) {
if (allowed.find(c) == allowed.end()) {
isOutstanding = false;
break;
}
}

// If the word is outstanding, increment the count
if (isOutstanding) {
count++;
}
}

return count;
}

int main() {
string msg;
getline(cin, msg);
cout << PrintResult(msg) << endl;
return 0;
}