#include <string>
#include <iostream>
#include <string>
#include <algorithm>

int
fact(int n){
	return n == 0 ? 0 : fact(n-1) + n;
}

int
chiwawa(std::string const& input, int start = 0){
	auto c = input.find('c', start);
	if( c == std::string::npos || c >= input.size() ) return 0;
	
	auto ws = std::count(std::begin(input)+c, std::end(input), 'w');
	auto result = fact(ws-1) + chiwawa(input, c+1);
	return result;
}

int
main(){
	std::string str;
    std::cin >> str;
	auto result = chiwawa(str);
	std::cout << result << std::endl;
	return 0;
}