use std::io;
use std::io::Write;
fn main() {
let stdin = io::stdin();
let mut stdout = io::stdout();
let mut line = String::new();
loop {
line.clear();
stdin.read_line(&mut line).unwrap();
if line.len() == 0 {
break;
}
stdout.write(line.as_bytes()).unwrap();
}
stdout.flush().unwrap();
}