#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int a[200005];

int main(){
  string s; cin >> s;
  vector<int> t;
  for(int i = 0; i < s.size(); i++){
    if(s[i]=='S') t.push_back(0);
    if(s[i]=='i' && s[i+1]=='n' && s[i+2]=='g') t.push_back(1);
  }
  int n = t.size();
  int cnt = 0;
  for(int i = n-1; i>=0; i--){
    if(t[i]==1) cnt++;
    a[i] = cnt;
  }
  int ans = 0;
  for(int i = 0; i < n; i++){
    if(t[i]==0) ans += a[i];
  }
  cout << ans << endl;
  return 0;
}