import os

fn main() {
	println('Hello world, args: $os.args')
	i := 123
	a := 'abc'
	b := 'xyz'
	e := 'a: $a b: $b i: $i'
	d := 'a: ${a:5s} b: ${b:-5s} i: ${i:20d}'
	println('a: $a $b xxx')
	eprintln('e: $e')
	println(d)
}
