fn tokenKind(c: u8) -> u8 {
    if c >= 48 && c <= 57 {
        return 1
    }
    if c >= 97 && c <= 122 {
        return 2
    }
    return 0
}

pub fn main(world: World) -> Void raises {
    if tokenKind(52) == 1 && tokenKind(97) == 2 {
        check world.out.write("lexer ok\n")
    }
}