fn main() {
    let list = [
        1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
        11, 12, 13, 14, 15, 16, 17, 18, 19,
        20, 21, 22, 23, 24, 25,26, 27, 28, 29, 30,
    ];
}