fn main() {
let (x, y) = (10, 20);
println!("{:?}", x);
println!("{:?}", y);
let (a, b, c) = (100, 200, 300);
println!("{:?}", a);
println!("{:?}", b);
println!("{:?}", c);
let ((p, q), (r, s)) = ((1, 2), (3, 4));
println!("{:?}", p);
println!("{:?}", q);
println!("{:?}", r);
println!("{:?}", s);
}