#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define ALL(v) v.begin(), v.end()
typedef long long ll;

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

int main(){
  string s;
  cin>>s;
  
  ll cnt=0,ans=0;
  rep(i,s.size()-2){
    if(s[i]=='S') cnt++;
    if(s[i]=='i' && s[i+1]=='n' && s[i+2]=='g') ans+=cnt;
  }
  cout<<ans<<endl;
 
  return 0;
}