Univariate Words

Write a boolean function is_univariate_word(s) that, given a string s,
returns True if and only if s consists of repetitions of one and the
same letter, ignoring case differences. For instance: word xxXxXXx is
univariate, but xxXxy is not.

Sample session

Problem information

Author: Unknown
Translator: José Luis Balcázar

Generation: 2026-01-25T17:35:41.683Z

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