#![allow(unused_variables)]

use std::io;
use std::io::BufRead;

use failure::*;
use failure::Error;
use failure::err_msg;

fn my_function() -> Result<(), Error> {
    let stdin = io::stdin();

    for line in stdin.lock().lines() {
        let line = line?;

        if line.chars().all(|c| c.is_whitespace()) {
            break
        }

        if !line.starts_with("$") {
            return Err(format_err!("Input did not begin with `$`"));
        }

        println!("{}", &line[1..]);
    }

    Ok(())
}

fn main() -> Result<(), Error> {
my_function()?
}