fn calc_idx(i: usize) -> usize {
    (i + i + 20) % 4
}

fn main() {
    let ns = [2, 3, 5, 7];

    for i in 3..10 {
        println!("{}", ns[i]);
    }

    for i in 3..10 {
        println!("{}", ns[i % 4]);
    }

    for i in 3..10 {
        println!("{}", ns[i % ns.len()]);
    }

    for i in 3..10 {
        println!("{}", ns[calc_idx(i)]);
    }

    for i in 3..10 {
        println!("{}", ns[calc_idx(i) % 4]);
    }
}