https://www.youtube.com/watch?v=AvxtJ9HQr8c https://www.youtube.com/watch?v=-1yqmc_6NgU

singleton https://eow.alc.co.jp/search?q=singleton singleton https://en.wiktionary.org/wiki/singleton (playing cards) A playing card that is the only one of its suit in a hand, especially at bridge. From single + -ton, probably following t…