extern crate bstr;
use std::error::Error;
use std::io::{self, Write};
use bstr::BString;
use bstr::io::BufReadExt;
fn main() -> Result<(), Box<Error>> {
let stdin = io::stdin();
let mut stdout = io::BufWriter::new(io::stdout());
let mut upper = BString::new();
stdin.lock().for_byte_line_with_terminator(|line| {
upper.clear();
line.to_uppercase_into(&mut upper);
stdout.write_all(upper.as_bytes())?;
Ok(true)
})?;
Ok(())
}