fn main() {
    let game = "X 7/ 9-  X F8 ⑧/ F6  X  X X8/"
        .chars()
        .filter(|c| !c.is_whitespace())
        .fold(Vec::new(), |mut rolls, roll| {
            match roll {
                'X' => rolls.push(10_u8),
                '/' => rolls.push(10 - rolls.last().expect("invalid game score")),
                c if c >= '0' && c <= '9' => rolls.push((u32::from(c) - 0x30) as u8),
                c if c >= '⑤' && c <= '⑧' => rolls.push((u32::from(c) - 0x245f) as u8),
                _ => rolls.push(0),
            };
            rolls
        });

    dbg!(game);
}