use std::io::Read;
fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	s.lines()
		.skip(1)
		.flat_map(str::parse)
		.for_each(|n: usize| println!("ABACBC{}", "ABC".repeat(n - 2)))
}