thumb|Plaque in tribute to Georges Perec by [[Christophe Verdon. Café de la Mairie, Place Saint-Sulpice in Paris]] A lipogram (from , leipográmmatos, "leaving out a letter") is a kind of constrained writing or word game consisting of writing paragraphs or longer works in which a particular letter or group of letters is avoided. Extended Ancient Greek texts avoiding the letter sigma are the earliest examples of lipograms.
thumb|Plaque in tribute to Georges Perec by [[Christophe Verdon. Café de la Mairie, Place Saint-Sulpice in Paris]] A lipogram (from , leipográmmatos, "leaving out a letter") is a kind of constrained writing or word game consisting of writing paragraphs or longer works in which a particular letter or group of letters is avoided. Extended Ancient Greek texts avoiding the letter sigma are the earliest examples of lipograms.
Writing a lipogram may be a trivial task when avoiding uncommon letters like Z, J, Q, or X, but it is much more challenging to avoid common letters like E, T, or A in the English language, as the author must omit many ordinary words. Grammatically meaningful and smooth-flowing lipograms can be difficult to compose. Identifying lipograms can also be problematic, as there is always the possibility that a given piece of writing in any language may be unintentionally lipogrammatic. For example, Poe's poem The Raven contains no Z, but there is no evidence that this was intentional.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).