fn main() {
    let days = [
        "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth",
        "tenth", "eleventh", "twelveth",
    ];
    let gifts = [
        "a partridge in a pear tree!",
        "two turtle doves",
        "three French hens",
        "Four calling birds",
        "five golden rings.",
        "six geese a-laying",
        "seven swans a-swimming",
        "eight maids a-milking,",
        "nine ladies dancing,",
        "ten lords a-leaping,",
        "eleven pipers piping,",
        "Twelve drummers drumming",
    ];
    for (i, item) in days.iter().enumerate() {
        println!(
            "On the {} day of christmas my true love gave to me",
            item
        );
        for j in (0..=i).rev() {
            println!("\t{}", gifts[j]);
        }
    }
}