println!("first");
for i in (0..640).step_by(128) {
    println!("{}", i)
}
println!("second");
for i in (0..640).step_by(128).skip(1) {
    println!("{}", i)
}
println!("third");
for i in (0..640).step_by(128).map(|i| i).skip(1) {
    println!("{}", i)
}