#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 result = 0;
	std::size_t c = -1;
	while(1){
		c = input.find('c', c+1);
		if( c == std::string::npos || c >= input.size() ) break;
		auto ws = std::count(std::begin(input)+c, std::end(input), 'w');
        if( ws == 0 ) break;
		result += fact(ws-1);
	}
	return result;
}

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