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

int main()
{
	string s;
	cin >> s;
	
	string t;
	deque<char> dq;
	for(int i = 0; i < (int)s.size(); i++)
	{
		if((int)dq.size() <= 1) dq.push_back(s[i]);
		else
		{
			if(dq[(int)dq.size() - 2] == 'i' && dq[(int)dq.size() - 1] == 'n' && s[i] == 'g')
			{
				dq.pop_back();
				dq.pop_back();
				dq.push_back('*');
			}
			else dq.push_back(s[i]);
		}
	}
	while(!dq.empty())
	{
		t += dq.front();
		dq.pop_front();
	}
	
	int64_t ans = 0;
	int64_t scnt = 0;
	for(int i = 0; i < (int)t.size(); i++)
	{
		if(t[i] == 'S') scnt++;
		else if(t[i] == '*') ans += scnt;
	}
	cout << ans << endl;
	return 0;
}