In September 2011, an unknown person on the internet forum 4chan showed people that there was definitely a smallest superpermutation for any superpermutation with more than 1 symbol. On the website, it was called "The Haruhi Problem", from a Japanese anime called "The Melancholy of Haruhi Suzumiya." It was phrased like this: what would be the shortest amount of episodes that you would need to watch in order to guarantee that you watched every episode of a show? In October 2018, mathematician Robin Houston tweeted about it. 