#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
long long sum[200020] = {0};
int main() {
    string s;
    cin >> s;
    int n = s.size();
    for (int i = 0; i < n - 2; i++) {
        if (s.substr(i, 3) == "ing") {
            sum[i]++;
        }
    }
    for (int i = n - 1; i > 0; i--) {
        sum[i - 1] += sum[i];
    }
    long long ans = 0;
    for (int i = 0; i < n; i++) {
        if (s[i] == 'S') {
            ans += sum[i];
        }
    }
    cout << ans << endl;
}