#include<stdio.h>
int main()
{
	char s[200005];
	scanf("%s", s);
	int i, n;
	for (n = 0; s[n] != '\0'; n++);
	long long int ans = 0, cnt = 0;
	for (i = 0; i < n; i++)
	{
		if (s[i] == 'S')
			cnt++;
		if (s[i] == 'i' && s[i + 1] == 'n' && s[i + 2] == 'g')
			ans += cnt;
	}
	printf("%lld\n", ans);
	return 0;
}