Univariate words

A word is said to be univariate when all its letters are the same. For
instance ’xxx’ is an univariate word. Write a function
@has_univariate_word(f)@ that given a list f of nonempty strings of
lowercase letters, returns True when f contains an univariate word. The
function returns False if f has no univariate words.

Important condition. Solutions employing position-wise indexed access to
the argument of the function (as in @f[i]@) are not accepted.

Sample session

Problem information

Author: ProAl

Generation: 2026-01-25T16:32:08.178Z

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