#include<iostream>
#include<string>
using namespace std;

int main()
{
	string s;

	cin >> s;

	int count = 0, ans = 0;
	for (int i = 0; i < s.length(); i++)
	{
		if (s[i] == 'c')
		{
			for (int j = i + 1; j < s.length(); j++)
			{
				if (s[j] == 'w')
				{
					count++;
				}
			}

			if (count > 1)
			{
				ans += count * (count - 1) / 2;
			}
			count = 0;
		}
	}
	cout << ans << endl;
}