fn run() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    let mut dp = vec![0u64; 3];
    for c in s.trim().chars() {
        match c {
            'c' => dp[0] += 1,
            'w' => {
                dp[2] += dp[1];
                dp[1] += dp[0];
            },
            _ => (),
        }
    }
    println!("{}", dp[2]);
}

fn main() {
    run();
}