use std::io::{self, Read, Write};

fn main() {
    let mut stdin = io::stdin();
    let mut stdout = io::stdout();
    let mut buffer = [0; 1024 * 64];

    loop {
        let n = stdin.read(&mut buffer).unwrap();

        if n == 0 {
            break;
        }

        stdout.write_all(&buffer[..n]).unwrap();
    }
}