#include <iostream>
#include <limits>

/*
 * [No.346 チワワ数え上げ問題 - yukicoder](http://yukicoder.me/problems/987 "No.346 チワワ数え上げ問題 - yukicoder")
 * 提出者 : まろ<marony@binbo-kodakusan.com>
 * 使用言語 C++
 */
using namespace std;

auto chiwawa_length(int start, string s) -> size_t {
    auto count = 0;
    auto index = s.find('w', start + 1);
    while (index != (size_t)-1) {
        index = s.find('w', index + 1);
        ++count;
    }

    return count * (count - 1) / 2;
}

auto main() -> int {
    string s;
    cin >> s;

    char c = 'c';
    auto index = s.find(c);
    auto count = 0;
    while (index != (size_t)-1) {
        count += chiwawa_length(index, s);
        index = s.find(c, index + 1);
    }

    cout << count << endl;

    return 0;
}