use std::io;

macro_rules! parse_input {
    ($x:expr, $t:ident) => ($x.trim().parse::<$t>().unwrap())
}

macro_rules! print_err {
    ($($arg:tt)*) => (
        {
            use std::io::Write;
            writeln!(&mut ::std::io::stderr(), $($arg)*).ok();
        }
    )
}

fn main() {
    let mut input_line = String::new();
    io::stdin().read_line(&mut input_line).unwrap();

    // let inputs = input_line.split(" ").collect::<Vec<_>>();
    // let k = parse_input!(inputs[0], i32);
    // let r = parse_input!(inputs[1], i32);

    let cs = input_line.trim().chars();
    let mut c_num: u32 = 0;
    let mut w_num: u32 = 0;

    for c in cs {
        if c == 'c' {
            c_num += 1;
        } else {
            w_num += 1;
        }
    }

    if c_num - 1 < w_num {
        println!("{}", c_num - 1);
    }
    else {
        print!("{}", w_num);
    }


}