use std::fmt::Write;
use crate::ctx::GenContext;
pub fn gen(ctx: &mut GenContext<'_>, buf: &mut String) {
let arr = ["20", "23", "24", "27"];
let prefix = arr[ctx.rng.urange(0, arr.len() - 1)];
buf.reserve(13);
buf.push_str(prefix);
buf.push('-');
ctx.rng.push_digits(buf, 8);
buf.push('-');
let _ = write!(buf, "{}", ctx.rng.range(0, 9));
}