import java.io.*;
import java.util.*;
import java.util.function.*;

final class Solver {
	void solve(Supplier<String> sc) {
		var S = sc.get().toCharArray();
		var cumOfW = new int[S.length];
		for (int i = 1; i < cumOfW.length; i++) {
			cumOfW[i] = cumOfW[i - 1] + (S[i] == 'w' ? 1 : 0);
		}

		long sumOfCWW = 0;
		for (int i = 0; i < S.length; i++) {
			if (S[i] != 'c') continue;
			long trailingWs = cumOfW[S.length - 1] - cumOfW[i];
			sumOfCWW += trailingWs * (trailingWs - 1) / 2;
		}

		System.out.println(sumOfCWW);
	}
}

class Main {
	public static void main(String... args) {
		System.setOut(new PrintStream(new BufferedOutputStream(System.out)));
		var reader = new BufferedReader(new InputStreamReader(System.in));
		new Solver().solve(new Supplier<>() {
			StringTokenizer line;

			public String get() {
				while (line == null || !line.hasMoreTokens()) try {
					line = new StringTokenizer(reader.readLine());
				} catch (IOException e) {
					throw new UncheckedIOException(e);
				}
				return line.nextToken();
			}
		});
		System.out.flush();
	}
}