fn main() {
    loop {
        println!("a");
    }

    'b: loop {
        println!("b");
        break 'b;
        println!("b");
    }


    while true {
        println!("a");
    }

    'b: while true {
        println!("b");
        break 'b;
        println!("b");
    }


    while let Some(_) = Some(()) {
        println!("a");
    }

    'b: while let Some(_) = Some(()) {
        println!("b");
        break 'b;
        println!("b");
    }


    for i in 0..10 {
        println!("a");
    }

    'b: for i in 0..10 {
        println!("b");
        break 'b;
        println!("b");
    }
}