use std::fmt::Write;
use crate::ctx::GenContext;
pub fn gen(ctx: &mut GenContext<'_>, buf: &mut String) {
if ctx.rng.maybe(0.5) {
let n = ctx.rng.range(100_000, 9_999_999);
buf.reserve(12);
let _ = write!(buf, "MRN-{n}");
} else {
let n = ctx.rng.range(10_000_000, 99_999_999);
buf.reserve(10);
let _ = write!(buf, "MR{n}");
}
}