/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.08.13 17:54:19
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

int main() {
    string s;cin >> s;
    vector<int> v; 
    for (int i = 0; i < s.size(); i++) {
        if (s[i] == 'S') v.push_back(0);
        else if (i + 2 < s.size() && s[i] == 'i' && s[i+1] == 'n' && s[i+2] == 'g') {
            v.push_back(1);
            i+=2;
        }
    }
    
    int ans = 0;
    int cnt = 0;
    for (int i = 0; i < v.size(); i++) {
        if (v[i]==0)cnt++;
        else ans+=cnt;
    }
    cout << ans << endl;
    return 0;
}