fn main() {
    let x = "here is a double quote: \x22 ";
    let y = r"this isn't a double quote: \x22, how do I show one?";
    let z = r#"Ah, here it is: ". But I want to show " + # but I can't "#;
    let w = r##"Sweet: "# "##;

    println!("{}", x);
    println!("{}", y);
    println!("{}", z);
    println!("{}", w);
}